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Showing results for tags 'nikon'.
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Hi, i have a nikon d3200 and astromaster 130eq. I want to click picutres with my dslr mounted on the telescope. I have a tring and adapter but the picture is always blurred and i can never get it sharp
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i have a nikon d3200 which i want to attach to my astromaster 130 eq i have these 2 things (shown in 1st photo) and when i attach these to my camera it says , 'lens not attached' i dont know what to do now, pls help
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Hi everyone, I have finally decided to upgrade to full frame and looking for some advice. I own a Nikon D300 and a Canon 600D. I have loved my Nikon for many years and would be happy to stick to the brand but, being honest, some features are a lot better on canon cameras (i.e. the fully articulated screen). I have been looking around a bit at different models and now my choice is between the 6D (new) and the 5D mark III (second hand) or mark IV (second hand). Have you guys have any experience with any of the 3? Which one should I go for? Pro and cons? Should I completely change my mind and stick with Nikon and get a D750? I'm quite lost and confused. Thanks in advance for any suggestion! Luca
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I have a nikon d5100 and I have just purchased the samyang 14mm f/2.8. when I try to capture an image with these the product image is very bright and not the correct aperture of 2.8 that I set it to. Can anyone recommend settings for me to try and capture the night sky with this camera and this lens?
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d7500 D7500 has high thermal pattern noise
MikeODay posted a blog entry in Nikon D7500 DSLR for Astrophotography
In an earlier post I examined the noise in single dark frames over a range of exposure times. My conclusion was that the Nikon D7500 was a lower noise camera than the D5300. This was also backed up by an examination of master bias frames that again strongly favoured the D7500. However ... The first image I attempted to produce with the D7500 exhibited very strong streaks in the noise. I had been in the habit of not using dark subtraction with the D5300 as it has very low thermal pattern noise. Accordingly, I again only used bias and flat frame calibration in the workflow that produced the above images. Whilst the streaks are due to patterns in the noise being spread across the image due to errors in the application of dithering during tracking, it did indicate that the D7500 did have significant thermal pattern noise. I found this surprising because the noise in individual frames ( when looked at in isolation ) seems to be completely random. I thought that perhaps my memory had failed me and maybe the D5300 has the same level of pattern noise but my memory was being tricked. That is, all my recent images with the D5300 were taken at lowish air temperatures ( ~5 deg or so ) whereas the image above was captured on warm nights ( low 20s ) and so maybe the D5300 would be just as bad at higher temperatures. To test this I produced bias corrected master darks for both the D7500 and D5300 from images all taken at around 20 deg or just over. The images below have all been stretched using the same screenTransferFunction applied to the Pixinsight histogram tool. The results are striking ... D5300 master dark ( 47 subs, bias corrected ) - red channel: D7500 master dark ( 281 subs, bias corrected ) - red channel: D5300 master dark 100% centre crop - red channel: D7500 master dark 100% centre crop - red channel: And the histograms of the full size images ( red channels ) ... D5300 master dark ( red channel ) histogram: D7500 master dark ( red channel ) histogram: The Pixinsight statistics tool calculates the following: D5300: mean 2.3, standard deviation 9.3 D7500: mean 7.5, standard deviation 20.8 ------------- Analysis: The images and histograms clearly show that the D7500 has higher pattern noise than the D5300. In particular, from the histograms, 0.1% ( 6,286 ) of D5300 pixels are more than 44 ADU whereas, for the D7500 this figure is 27 times as great at 2.7% ( 141,305 pixels ). Furthermore, the master dark for the D5300 was only produced using 47 images -v- 281 for the D7500 so I would expect that this difference would be even higher with more D5300 frames. On the other hand, whilst not shown in the histograms above, my D5300 does have more 'very hot' pixels than the D7500 ( 579 pixels greater than 400 ADU -v- 10 pixels greater than 400 ADU ). However, these hot pixels are very easily removed via dithering during tracking and sigma clipping when integrating. The very large number of warm pixels however are very difficult to remove as dithering just places different warm pixels on top of each other. I went back and examined the 'random' noise seen in the individual D7500 dark frames ... and yes they do look random when seen individually, however, when flicking between a number of frames it is clear that the 'random' pattern is repeated in each frame! Conclusion: My D7500 has very significant thermal pattern noise, albeit randomly distributed in a fixed pattern. ............ Next steps (?) - I could use in dark subtraction during calibration to reduce the impact of pattern noise - however, as my camera is not cooled and the night's temperatures are constantly changing, any master dark will not closely align to the actual thermal pattern noise and as such dark subtraction may help but will not solve the problem - Using in-camera dark subtraction ( Nikon's long exposure noise reduction feature ) would almost completely remove the pattern noise from each frame. However, due to the extra random noise being introduced by subtracting another noisy dark frame from each light frame, as well as the reduction in total light frames by 2, the resultant images will suffer from higher levels of random noise. So whilst this would be an improvement with respect to the pattern noise, it is not a complete solution. - Third option, sell the D7500 and go back to using the D5300 ... -
Below is a comparison between single dark frames taken with the Nikon D7500 and D5300 with exposure durations varying from 1 sec to 240 sec ( my usual main light frame exposure ) all at ISO400. Firstly a graph of the standard deviation of the noise in the dark frames versus exposure time: The standard deviation of the noise is a fairly constant 2 ADU less for the D7500 compared to the D5300 ( pretty much the difference in the read noise between the two ) However, the difference is not just in absolute terms but also in the quality of the noise ... Below are the dark frames - ranging from 240 sec exposures at the top to 1 sec at the bottom: D7500 D5300 The D5300 dark frames clearly show the pattern in the read noise ( banding down the bottom ) and also have far more chrominance noise compared to the D7500. At 240 seconds ( the main exposure I have been using ) the difference is starkly different; the D7500 produces images with much lower noise that is significantly more even and random and hence more likely to be reduced during integration.
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The Nikon D5300 has a well-earned reputation as one of the lowest noise DSLR cameras used for Astrophotography. Now that I have a new Nikon D7500, I was keen to see how it compared to the D5300 in terms of the level of read noise and the extent to which that read noise is non-random ( and thus needs to be removed using a Master Bias frame to prevent it summing up during image integration). So here goes ... ......... A single bias frame Nikon D5300: ISO400, 1/4000th second: This may look pretty bad but really the extreme stretch is bringing out the very small variations across the frame: Standard Deviation: 3.53 ADU ( note: in this context, 3.53 ADU means 3.53 "units" on a real number scale ranging from 0 to 16,383 ( ie. a real conversion of a 14 bit digital scale )) The master bias frame looks like this: Nikon D5300: ISO400, 1000 x 1/4000th sec frames Standard deviation: 0.48 ADU The bands at the bottom are each 1 ADU brighter than the one above. Now for the D7500 ... A single bias frame from the Nikon D7500: ISO400, 1/4000th second: It is immediately clear that the single bias frame is cleaner. The statistics confirm this: Standard Deviation: 1.37 ADU And the master bias ... Nikon D7500: ISO400, 1000 x 1/4000th sec frame Standard deviation: 0.07 ADU The band at the bottom is 1 ADU brighter than the background. The improvement is very obvious Std. Deviation single bias frame: 1.37 versus 3.53 Std. Deviation master bias ( 1000 frames ): 0.07 versus 0.48 In graphical form ... Conclusion: The read noise in a single frame from the D7500 is around 40% of that in one from the D5300. This should give me greater flexibility to reduce exposure times and still ensure that the read noise is only an insignificant component of the overall noise. I will need to consider further the impact of the very low level of pattern noise in the Master Bias; it is so low that I will think about whether or not I still need to calibrate my lights with a Master Bias ( particularly for long exposures when the noise is dominated by light pollution and thermal noise ).
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d7500 My new love - the Nikon D7500
MikeODay posted a blog entry in Nikon D7500 DSLR for Astrophotography
It was love at first sight when I first laid eyes on the gorgeous noise curves of my dear Nikon D5300; young and beautiful with a great body and a large sensor, I was smitten. Now, well, what can I say... my roving eye has spied a new beauty; younger with heaps of energy that should go all night and , whilst I do prefer larger sensors, I can’t stop thinking about the noise curves hidden beneath that lovely new body... I struggled with my guilt for ages, I really did, but the time has come - I’m dumping the D5300 for the new love of my life; the Nikon D7500. -
Andromeda Galaxy Group Nikon D5100 -- Nikkor 70-300 at 200mm 60x30 sec + DOF Star Adventurer© AstroM1
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Nikon D5100 + WO ZS73 II Star Adventurer Pro 150 x 30 sec + DOF
© AstroM1
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Bright Nebula in Ara ( NGC 6188 ) source: 500px.com/mikeoday
MikeODay posted a gallery image in Member's Album
From the album: Mike's Images
Bright Nebula NGC 6188 and open cluster NGC 6193 in Ara by Mike O'Day Magnitude +5.19, RA 16h 41m 42s, Dec -48deg 48' 46" Approx. 3800 light years away Skywatcher Quattro 10" f4 Newtonian. Skywatcher AZ Eq6 GT Mount (on concrete pier) Orion 80mm f5 guide scope and auto guider - PHD2. Baader MPCC Mark 3 Coma Corrector, UHC-S 'nebula' filter. Nikon D5300 (unmodified). Field of view (deg) ~ 1.35 x 0.90. UHC-S - 32 x 180 sec ISO800 (14bit NEF, Long Exp. NR on). Pixinsight and photoshop 7 July 15 (processed 29 August 15) source: photo.net/photos/MikeODay 500px.com/mikeoday© Copyright Mike O'Day 2015 - all rights reserved
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From the album: Isa's Astroatelier
Total 1h46 ISO 1600 Telescope: Takahashi FSQ-85EDX DSLR: Nikon D800 Mount: Avalon Linear Fast Reverse Filter: Hutech IDAS LPS-D1 Autoguider: Lacerta MGEN-3© Isabel Streit 2021
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messier 8 The Lagoon Nebula ( Messier 8, NGC 6523 ) in Sagittarius
MikeODay posted a gallery image in Member's Album
From the album: Mike's Images
The Lagoon Nebula ( Messier 8, NGC 6523 ) in the constellation Sagittarius - by Mike O'Day ( https://500px.com/mikeoday ) The Laboon Nebula ( M8 ) is visible to the naked eye under dark skies from most latitudes except the far north. Seemingly covering an area about three times that of the full Moon, M8 actually covers an area somewhat greater than 110 light years and is around 4300 light years from Earth in the Sagittarius-Carina spiral arm of the Milkyway galaxy. Links: https://500px.com/MikeODay http://photo.net/photos/MikeODay Details: Messier 8, NGC 6523 - Lagoon Nebula. also contains: NGC 6526 NGC 6530 NGC 6533 IC 1271 IC 4678 7SGR 9SGR Skywatcher Quattro 10" f4 Newtonian telescope. Skywatcher AZ Eq6 GT Mount. Orion auto guider - PHD2. Baader MPCC Mark 3 Coma Corrector, UHC-S 'nebula' filter. Nikon D300 (unmodified) (14bit NEF). Field of view (deg) ~ 1.35 x 0.90. 20 x 120 sec ISO400. 26 x 30 sec ISO 1600. 23 x 240 sec ISO 200. PixInsight and Photoshop. 2 August 14 . re-processed 24 April 2016 to include the additional subs ( the first version only made use of the 23 x 240 sec ISO 200 subs ) and putting use the processing lessons I have learnt over the past year.© Copyright Mike O'Day 2016 - all rights reserved
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From the album: Mike's Images
Orion Nebula Skywatcher Quattro 10" f4 Newtonian. Skywatcher AZ Eq6 GT Mount Orion 80mm f5 guide scope and auto guider - PHD2. Baader MPCC Mark 3 Coma Corrector, UHC-S 'nebula' filter. Nikon D5300 (unmodified). Field of view (deg) ~ 1.35 x 0.90. ISO800, JPEG Fine, Long Exp. NR on. HDR processed in PixInsight - 20x120sec, - 20x30sec, - 20x 8sec, - 12x4sec. Individual groups aligned and integrated. Then four integrated images aligned and HDR combined. 17 January 2015 - reprocessed 25 Apr 2015© Copyright Mike O'Day 2015 - all rights reserved
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From the album: Mike's Images
NGC 3372 Eta Carinae Nebula (RA 10:44:22.47 - Dec -59 56' 36.5"). Skywatcher Quattro 10" f4 Newtonian. Skywatcher AZ Eq6 GT (on Pier) Orion auto guider - PHD2. Baader MPCC Mark 3 Coma Corrector, UHC-S (Nebula) filter, Nikon D5300 (unmodified), Long Exp Noise Reduction on, 12bit NEF, UHC-S 15 x 120 sec ISO800. PixInsight & Photoshop 19 March 15© Copyright Mike O'Day 2015 - all rights reserved
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From the album: Mike's Images
IC2948 Running Chicken Nebula in Centaurus ( bright star is Lambda Cenauri) (RA 11h 39.6m - Dec -63deg 37.2'). Skywatcher Quattro 10" f4 Newtonian. Skywatcher AZ Eq6 GT (on Pier) Orion auto guider - PHD2 (RA only - Dec ungiuded). Baader MPCC Mark 3 Coma Corrector, UHC-S (Nebula) filter, Nikon D5300 (unmodified), Long Exp Noise Reduction on, 14bit NEF, 13 x 300 sec ISO 200. PixInsight & Photoshop 28 March 15© Copyright Mike O'Day 2015 - all rights reserved
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From the album: Mike's Images
Cat's Paw Nebula - NGC 6334 ( aka Bear Claw Nebula ) An emission nebula in Scorpius (near the scorpion's tail) RA 17h 25m 39.6s ; Dec -35deg 43' 48" . 7th August 2015. Skywatcher Quattro 10" f4 Newtonian. Skywatcher AZ Eq6 GT Mount Orion 80mm f5 guide scope and auto guider - PHD2. Baader MPCC Mark 3 Coma Corrector, UHC-S 'nebula' filter. Nikon D5300 (unmodified). Field of view (deg) ~ 1.35 x 0.90. ISO800, 14bit NEF, Long Exp. NR on. 28 x 200sec (starting at zenith) no moon, 3deg C, 70%RH, moderate LP. PixInsight© Copyright Mike O'Day 2015 - all rights reserved
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From the album: Mike's Images
NGC 6357 in Scorpius Skywatcher Quattro 10" f4 Newtonian. Skywatcher AZ Eq6 GT Mount Orion 80mm f5 guide scope and auto guider - PHD2. Baader MPCC Mark 3 Coma Corrector, UHC-S 'nebula' filter. Nikon D5300 (unmodified). Field of view (deg) ~ 1.35 x 0.90. UHC-S - 100 x 100 sec ISO800 (14bit NEF, Long Exp. NR on). Pixinsight and photoshop© Copyright Mike O'Day 2015 - all rights reserved
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From the album: Mike's Images
Blue Moon - 31st July 2015 Skywatcher Quattro 10" f4 Newtonian ("full moon" dust cap in place). Skywatcher AZ Eq6 GT Mount Orion 80mm f5 guide scope and auto guider - PHD2. Baader MPCC Mark 3 Coma Corrector, UHC-S 'nebula' filter. Nikon D5300 (unmodified). ISO200, 14bit NEF, Long Exp. NR off. 487 sub exposures @ 1/50th Subs taken over 45min period covering Full Moon @ 10:42 UT (8.42pm local time). Processed using Registax and Photoshop© Copyright Mike O'Day 2015 - all rights reserved
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From the album: Mike's Images
NGC 2070 Tarantula Nebula Skywatcher Quattro 10" f4 Newtonian. Skywatcher AZ Eq6 GT Mount. Baader MPCC Mark 3 Coma Corrector. Nikon D300 (unmodified). 80 x 30 sec ISO800 unguided. 24 Apr 14 Reprocessed 9 August 15© Copyright Mike O'Day 2015 - all rights reserved
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From the album: Mike's Images
Cat's Paw Nebula - NGC 6334 ( aka Bear Claw Nebula ) An emission nebula in Scorpius (near the scorpion's tail) RA 17h 25m 39.6s ; Dec -35deg 43' 48" . 7th August 2015. Skywatcher Quattro 10" f4 Newtonian. Skywatcher AZ Eq6 GT Mount Orion 80mm f5 guide scope and auto guider - PHD2. Baader MPCC Mark 3 Coma Corrector, UHC-S 'nebula' filter. Nikon D5300 (unmodified). Field of view (deg) ~ 1.35 x 0.90. ISO800, 14bit NEF, Long Exp. NR on. 28 x 200sec (starting at zenith) no moon, 3deg C, 70%RH, moderate LP. PixInsight© Copyright Mike O'Day 2015 - all rights reserved
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From the album: Mike's Images
Eagle Nebula - Messier 16 Skywatcher Quattro 10" f4 Newtonian. Skywatcher AZ Eq6 GT Mount Orion 80mm f5 guide scope and auto guider - PHD2. Baader MPCC Mark 3 Coma Corrector, UHC-S 'nebula' filter. Nikon D5300 (unmodified). Field of view (deg) ~ 1.35 x 0.90. ISO800, 14bit NEF, Long Exp. NR on. 33 x 180sec (1/3 before & 2/3 after zenith) New Moon, 4deg C, 75%RH, moderate LP. PixInsight© Copyright Mike O'Day 2015 - all rights reserved
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From the album: Mike's Images
Eagle Nebula - Messier 16 Skywatcher Quattro 10" f4 Newtonian. Skywatcher AZ Eq6 GT Mount Orion 80mm f5 guide scope and auto guider - PHD2. Baader MPCC Mark 3 Coma Corrector, UHC-S 'nebula' filter. Nikon D5300 (unmodified). Field of view (deg) ~ 1.35 x 0.90. ISO800, 14bit NEF, Long Exp. NR on. 33 x 180sec (1/3 before & 2/3 after zenith) New Moon, 4deg C, 75%RH, moderate LP. PixInsight© Copyright Mike O'Day 2015 - all rights reserved
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From the album: Mike's Images
Eagle Nebula - Messier 16 Skywatcher Quattro 10" f4 Newtonian. Skywatcher AZ Eq6 GT Mount Orion 80mm f5 guide scope and auto guider - PHD2. Baader MPCC Mark 3 Coma Corrector, UHC-S 'nebula' filter. Nikon D5300 (unmodified). Field of view (deg) ~ 1.35 x 0.90. ISO800, 14bit NEF, Long Exp. NR on. 33 x 180sec (1/3 before & 2/3 after zenith) New Moon, 4deg C, 75%RH, moderate LP. PixInsight© Copyright Mike O'Day 2015 - all rights reserved
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From the album: Mike's Images
Eagle Nebula - Messier 16 Skywatcher Quattro 10" f4 Newtonian. Skywatcher AZ Eq6 GT Mount Orion 80mm f5 guide scope and auto guider - PHD2. Baader MPCC Mark 3 Coma Corrector, UHC-S 'nebula' filter. Nikon D5300 (unmodified). Field of view (deg) ~ 1.35 x 0.90. ISO800, 14bit NEF, Long Exp. NR on. 33 x 180sec (1/3 before & 2/3 after zenith) New Moon, 4deg C, 75%RH, moderate LP. PixInsight© Copyright Mike O'Day 2015 - all rights reserved
