Vroobel

Jupiter, Mars and the Moon tonight. 🙂

Oho, lot of questions! Honestly, I don't know. I just checked, it seems similar regardles the exposition time (60s, 150s, 300s), but I think it's more visible with stronger stretching. And I don't remember whether I took photos shorter than 60s. I don't think so. It happens both with no filter at all and with filters LPS: IDAS LPS-D2 and IDAS LPS-P2 and also dual band Opiolong L-eXtreme. The last one especially should cut out all unwanted light. Hmm, I didn't realise any. Moreover, When I sent the camera to astro modification, I had a question about its condition. I replied that it's in very good used condition. I have bought it from a professional seller as used with a 12 month warranty, so they would risk a lot if they sell faulty camera for nearly 500£. Regarding the missing screw, I think I would know about it if it happened, from the man who modified the camera. That's interesting approach. Thanks for the idea! No, it isn't. That means there is a red LED indicating (as I think) saving the image to the memory card. It's off during the exposition. Also the viewfinder is black at all, only displaying some values when the camera begins saving data. I'm not sure, but I think I already switched the indicators off. What do you mean? I have no Canon or compatible lens, I have bought the body only just as a full frame sensor for astrophotography, so I cannot compare and check it in other ways. My conclusion is that it's more visible with stronger post processing. This is a complicated subject. My home-made EQ fork mount still requires some improvements. I can obtain nice pics, but I think the signal is low because of poor guiding. I work on it and have some ideas, so we'll see very soon. Sey stars, they are not pinpoint, but like small disks or more often ovals. The worse the guiding is, the more oval they are. I suspect that improving the guiding would significantly limit the need of strong stretching, am I right? Maybe then the bars are less visible? Vroobel Edit. I forgot to mention that the bars are rather dark on a lighter background - the gradient makes them visible. But after use of the GradientXterminator the bars are also visible. Why are they dark? If it's an effect of unwanted light they should be bright.

Hi Michael, Yes, my viewfinder is covered. I dont't complain about the gradient. I asked for a cause of the dark bars in the bottom. Tomasz.

Thank you @vlaivfor your patience and another explanation. I found nearly same question in one of following threads about cameras, your answer also was there. I had to ask, if not I simply forget. Edit. I mean I found the question and answer after I asked my one.

What about a binning mode 2 or 3, if needed? I mean using the 3.75um pixel for the Quark. The effective pixel area is 4 or 9 times bigger than. What about the readout noise?

Hi, I have a Canon EOS 6D Mk I camera that I bought as used from a professional camera seller with a 12 month warranty, so I think it was a good deal. Since the beginning I have had some problems with dark bars in the bottom right corner of the pictures and they are unable to be removed, even if I also do a set of 20 or 50 calibration frames. In the meantime I ordered an astro modification at one of the local specialists. I still see the unwanted effect, so I mention the modification to exclude the case that it happened just because of the operation. I place two highly stretched raw stacks of the M81 and M82 obtained with the IDAS LPS-P2 filter and also the M45 without any filter to exclude the suspicion that it can be caused by some filters. Accidentally you can see a gradient, but it's not related to any gradient, because I experienced it in different conditions. I hope someone can explain why it happens and how to cope with it. Best regards, Vroobel

I would say ASI678MC. Look please on this calculator: https://www.astropix.com/html/astrophotography/astrophotography-calculators.html#cs Taking an average seeing 4/5 into account the 2um pixel doesn't require any Barlow.

Hi, This picture is a simple test, how my IDAS LPS-P2 works. I had to buy used one, that's why I had no choice and decided to do it just for test, even with 74% of the full Moon. I performed 250 x 60s light frames, but a half of them were unusable because of the Moon's light, so it's a little bit poor. Newton 9" F/5.5, IDAS LPS-P2, MPCC III, EOS 6D mod. 108 x 60s ISO1250 + 3 x 50 calibration frames.

Thank you, that's nice.

Hi, I just found out about this thread, so copied my post from the "Show us your set up in action at night" one. Sunspot group #3135. Starvawe 102ED F/11, Baader OIII visual 2" and ASI678MC.

Oops, I didn't know about it

Hi. To be honest, it is not at night, but it is still the astrophotography. Sunspot group #3135. Starvawe 102ED F/11, Baader OIII visual 2" and ASI678MC.

That's why yesterday I equipped my laptop with second internal 1TB SSD. Windows 11, all installed software and documents are kept on the main SSD, while the second one is only for the astrophotography purpose. Thankfully the 1TB SSD by Intel is 4.5x cheaper than the camera 🤣

Hi, I have the ASI678MC and finally my ASI224MC can rest on the Evoguide 50ED for purpose of guiding. I'm going to use the 678 with my Starwave 102ED F/11, they match perfectly to each other. https://www.astropix.com/html/astrophotography/astrophotography-calculators.html#ispp There are also Baader 2" UV/IR Cut and ZWO ADC in the path. The camera offers a lot of ROI formats. Because of a poor PA I had to use 2160x2160 for #3131 sunspot. It was moving across the field, but I'm happy of the result. Please be aware that it was only around 3/5 of seeing (a jet stream >20m/s). I still wait for the perfect air condition. 2ms exposures and only 30fps was enough to fill out my laptop's SSD transfer. 22 AVIs 5000 frames each one means over 400GB of data! That's crazy! 😁

Hi, Another revision of the M31 taken previously. Only a brightness and contrast are corrected. The core of M31 seems a little bit too bright, but the general look in my opinion is better, than previously.

Hi, Last night I had a plan to take some photos of the Pacmna Nebula. Unfortunatelly, I met some problem around Zenith, so I changed the plan and aimed my OTA on the Pleiades. I had an idea to not use any filter. I have read that a dew shield may protect the OTA from a side light, so I wanted to test it with a brand new Astro Essentials one. Newton 9" F/5.5, no filter, Baader MPCC Mk III, EOS 6D mod. 150 x 60s + 3 x 20 calibration frames, ISO1250. It was very hard to remove the Bortle 6-7 sky cast. I'm pretty proud of the effect, even if it's not perfect. And here is, how the single RAW looks like.

Hi, Picture of Mars, 20% of 5000 frames 31th September 2022 at 06:20 by SharpCap using Bresser Messier 10" Newtonian OTA reduced to 9" (F/5.5), Revelation 2" x2 ED Barlow and ASI678MC camera on my ATM EQ fork mount. Place of capturing: backyard in Liverpool, 53* 25' N. Bortle 6-7. Seeing: like usually in my location, 3/5. Stacking and sharpening performed with the AutoStakkert!, some cosmetics with Affinity Photo and Registax 6. Altitude: 44* 03' over horizon (Stellarium). I forgot: I used Baader UV/IR Cut filter.

Hi, Hunt for the Pacman.

Hi again, I'd like to replace my previous picture of Jupiter with the same, but in second revision: it's a little bit sharper after some cosmetic improvement. My picture is a result of around 80% of 4500 frames (2.5 minutes in total) recorded on 30th September 2022 at 00:06 by SharpCap using Altair Starwave 102ED F/11, Baader Q-Barlow z2.25, ZWO ADC and ASI224MC camera on 1-axis driven SW EQ5. Place of capturing: backyard in Liverpool, 53* 25' N. Bortle 6-7. Stacking and sharpening performed with the AutoStakkert!, some cosmetics with Affinity Photo and Registax 6. The Stellarium says, that Jupiter was 35* 34' over horizon then, so quite low. Moons respectively from the left: Callisto, Europa and Io.

Hi. I modified my EOS 6D there: http://www.astronomiser.co.uk/filters.htm I'm happy and you can see result here:

Hi. I have an EOS 6D mod and the L-eXtreme. It's great filter, but strongly darkens the picture. I.e., flats with 1/2 ADU max without filter at all are set for 1/2000s, while with the L-eXtreme 1/80s. The 6D has big, 6.5um pixel and it's very sensitive in red, if moded. I use a Newtonian OTA with 230mm aperture that is quite big. I'm not experienced astro photographer, so cannot say too much, but I think it's very good combination. Here is my first result. It's 45x300s, ISO1250 + 3x20. I'm going to grab a Pacman Nebula ASAP with the same setup, so we'll verify whether it's repeatable.

Hi, This is test of my brand new ASI678MC camera with 2um pixel. Today (28/10/2022) was a cloudy day with around 2h of partly cloudless sky. It seems like the pixel is just perfect for the 102ED F/11 lens, no Barlow at all! The #3131 Sunspot has area around 450 mln km2 that is 3x the area of cross-section of the earth! Here is, how the sunspot looks (i hope they keep data of the old sunspot forever): https://www.spaceweatherlive.com/en/solar-activity/sunspot-regions.html#3131

Hi, It was a hard battle and I'm not sure why. I approached the data four times. Thankfully I had a backup on external hard drive, because after third attepmpt I removed entire folder. I'm sure that next time will be better. Data collected on 01/09/2022. 79 x 150s, ISO1250, 3x20 callibration frames, crop of the full frame. Newton 9"/1270mm, IDAS LPS-D2, Baader MPCC III, EOS 6D mod.

This is a result of around 80% of 5000 frames recorded on 29th September 2022 at 21:44 by SharpCap using Altair Starwave 102ED F/11, Baader Q-Barlow z2.25, ZWO ADC and ASI224MC camera on 1-axis driven SW EQ5. Place of capturing: backyard in Liverpool, 53* 25' N. Bortle 6-7. Stacking and sharpening performed with the AutoStakkert!, final cosmetics with Affinity Photo. The Stellarium says, that Saturn was 20* 06' over horizon then, so very low, even if it was its highest position. Titan is visible under the planet.

Hi, My picture is a result of around 80% of 4500 frames (2.5 minutes in total) recorded on 30th September 2022 at 00:06 by SharpCap using Altair Starwave 102ED F/11, Baader Q-Barlow z2.25, ZWO ADC and ASI224MC camera on 1-axis driven SW EQ5. Place of capturing: backyard in Liverpool, 53* 25' N. Bortle 6-7. Stacking and sharpening performed with the AutoStakkert!, final cosmetics with Affinity Photo. The Stellarium says, that Jupiter was 35* 34' over horizon then, so quite low. Moons respectively from the left: Callisto, Europa and Io.