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Showing results for tags 'reducer'.
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Hello, does anyone know if my imaging train looks correct, and if it does, why am i still getting these coma errors? Could it be incorrect backfocus? Searching the internet makes me think my dslr is 44mm, adding the t ring (even tried a 1mm spacer too) gets me to the required 55mm (assuming that's correct) I have no idea how to solve this and i feel like I'm just throwing money down the drain fighting this in vien. Help would be much appreciated. Skywacher Evostar 72ed Reducer rotator for 72ed (needs this for extra distance to achieve focus, the reducer and adapter alone do
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Hi all, With the ongoing stock shortage it's going to be sometime before I get my hands on my desired scope for my ideal setup. I'd like to make the most of my current scope until stocks replenish and so I have a few questions about Flatteners and Reducers. I currently have a Celestron Inspire 100az (details here), a Canon 450D and a EQ3 Pro (synscan). As I understand, the 660mm focal length makes the scopes FOV too narrow for a mount such as the EQ3. Am I able to add a reducer to bring the focal length down to a level that would be suitable for this mount? If so, can
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Hi Everyone, I've just bought a Skywatcher Evostar 72ed but can't get hold of the sky-watcher .85x reducer/flattener or the OVL versions in these current times. Can anyone suggest any alternatives to the above? Many thanks John (UK)
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Hello, I recently purchased my first telescope and camera, and now I want to make sure I have the correct Barlow or reducer to couple them together to achieve Nyquist sampling on the camera (or slight over-sampling). In case it’s important, I’m interested in planetary imaging—in theory that shouldn’t matter for this sampling question, but maybe there are other considerations to take into account. I used this calculator (https://astronomy.tools/calculators/ccd_suitability) and plugged in my info: Telescope: Celestron 8 SE Camera: ZWO ASI462MC Seeing: exper -
For sale meade series 4000 f/3.3 celestron #94175 f/6.3 £40 each -
Hello all, I'm selling the original Takahashi TKA31580S Reducer/Flattener for TSA 102/TSA120/FS102/28/TOA130/150. Condition: Pristine, as NEW (and it was never cleaned, just blown) Reason to sell: I don't make astrophotography anymore! You can visit my ASTROBIN page (https://www.astrobin.com/users/paulobao/) or find me here . Price: 350 Euro. -
Adjustable and suitable for many refractors between 500 - 1000mm focal length. 0.8x reducer and good field flattened combined. Hardly used and in mint condition in box. Looking for £85 plus postage, but open to offers. Please contact me if you need any further info. I can provide pictures if needed. Thanks. -
Hello, I own a Vixen ED-80 refractor which is used with a custom focuser by Telescope Service. (pictured below) A Celestron f/6 SCT reducer corrector did not provide decent images either because it is not appropriate or because I did not maintain the correct distance. I am thinking of buying the Sky-Watcher .85x Reducer/Flattener instead, as it is made for similar ED80 telescopes. I do not know what is the correct distance of the SkyWatcher reducer for my setup and more important, I do not know if it will focus with the custom TS focuser. Do you have any similar
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Hi Everyone, need a little help choosing the right flattener/reducer for the William Optics Zenithstar73. I am after one that does both jobs so that rules out the dedicated Flat73 which is just a flattener! So I was wondering if I could get away with the Flat6 0.8 reducer which does say it works on scopes 70 - 80mm f/6 but doesn't list the ZS73 in the models list or do I need to spend the extra and get the Flat6A11? Can anyone shed some light on this have email 365 where I have seen the Flat6 but had no reply. Thanks in advance. -
Hi All I posted recently asking about suitability of using a 0.6 reducer with a 66mm scope....to cut a long story short I decided to get one and try it with my Megrez 72. I bought one (the Altair 0.6 reducer flattener) and it arrived yesterday ...however there are no instructions or diagrams whatsover included (not good) and I am wondering about the back focus spacing. After some searching online it seems the measurement is 55mm.....however I cant find a diagram of this exact reducer anywhere showing where to measure the distance from. I emailed the shop and they kindly rep
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I think this was intended for use with the Megrez 72, Z70, Megrez 80, Megrez 102 and FLT110. I used it with a Megrez 72 but I no longer have that scope so this is surplus now. In excellent condition with caps but no box. Selling for £95 including postage. Payment via Paypal (you pay fee or send as gift) or bank transfer.
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Dear Riccardi Users & any knowledgeable Stargazers: the specs of the smaller, M63 Riccardi APO reducer say that it has a 42mm corrected field. Does it work well with full-frame cameras? I would like to use it on my 90/600 TS photoline APO. The bigger one would be quite tricky to mount:(. As for camera, 1st round I'd get a sony A7, but later on maybe a large mono CCD/CMOS when they become more affordable. -
I was wondering if the smaller, M63 thread Riccardi reducer is enough to light up a full-frame sensor? I have a 90/600 apo and intend to use the reducer with all kind of cameras I encounter, Sony A7, monochrome CCD, etc. I expect this piece of glassware to be a (very?) long-term tenant in my gearbox:). According to specs (42mm field diameter), it should cover the frame. Does anyone using this reducer?
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Hi everyone, really need some help as I can't get my head around this. I need a coma corrector as I'm using a Newtonian and coma is so bad so I'm getting the baader mpcc mark 3 coma corrector. I would also like to get a focal reducer of around 0.5x My question is can anyone suggest an item where these are built into one, or can a focal reducer be screwed into the coma corrector? -
Altair Astro has an inexpensive 0.8x reducer for refractors, but I had never seen any actual results with it, at least not with my SkyWatcher refractors (Evostar 80ED and Equinox 80ED), so I thought I'd get one and see. Turns out it works well with the Evostar, even giving you some advantages over the expensive matched 0.85x reducer, and it is not bad even at the corners of an APS-C sensor: So people who can't afford the SW 0.85x should perhaps consider it. It wasn't such a good match for the Equinox unfortunately. For more details and comparison with the TeleVue TRF-2008, you c- 11 replies
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For my 16" Meade ACF F8, I'll be buying a Moravian G4-9000 camera with KAF-9000 chip. The KAF-9000 chip is 36.7mm square, a big chip! on paper the Explore Scientific 3" 0.7 reducer/field flattener could work well right to the edge, but has anyone tried it with Meade ACF telescopes? Also, I'm wandering what is the light cone of the Meade 16" ACF F8, will I get a lot of vignetting with that chip? I have a friend who has tried a KAF-9000 with his Meade 12" ACF F8 with very acceptable results. Thank you for your time. -
This is an unusual combination. I bought a Denkmeier PowerSwitch on a 2" WO diagonal (if I remember correctly). The diagonal was not in brilliant shape, and I wanted to be able to use my Baader Zeiss T2 prism with it, so I removed the diagonal, fitted a T2 Adaptor and there you have it. PLEASE NOTE The Zeiss prism is excellent, but does have some slight damage to the coatings. On one side, an eyepiece barrel contacted the surface and left a ring which is obviously ring on the limit of a 1.25" fov. On the other, there is a slight mark. Neither of these are visible in use, or have the sligh
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Following the sale of my beloved SCT I have a few accessories for sale.... SOLD - Celestron f/6.3 reducer (https://www.firstlightoptics.com/reducersflatteners/celestron-f63-focal-reducer.html) - Good condition no marks asfaik. £40 - Altair Astro 2" Dielectric Diagonal (http://www.tringastro.co.uk/altair-2-meade-celestron-sct-dielectric-diagonal-99-reflective-coating-4170-p.asp) - probably just a bit dusty but the mirror is certainly fine. SOLD - Baader Click-Lock for Celestron & Meade SCT (https://www.firstlightoptics.com/adapters/baader-click-lock-2-for-celestron-meade-sct
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I have a celesctron nexstar 8SE OTA, to which I attach my focal reducer (0.63x by celestron), the a T-Adapter-SC, a t-ring and then my dslr. Does the T-Adapter affect the performance or use of the focal reducer? Emilis
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Hello 6" GSO RC users (mine's a TS Optics but all brands are similar) A picture is worth a thousand words. So if you have a photo of your rig with spacers etc and a DSLR attached, I'd love to see it so I know what I need to set me on the road to astrophotography. A big thank you to anyone willing to help. Tony -
Time for yet another cry for help when it comes to choosing diagonal. I have read the many similar threads and gathered some knowledge (too many to start linking). I have come some way in my process and now that it is coming to final decisions I would like to hear from the experts. Not many of threads I have read end with the OP returning to deliver some review/verdict of his/her final decision. While I wait for response on some thread where I asked about the result, the eagerness in me forces me to write my own thread. Perhaps some of the people asking these questions before can now answer in -
Hi, sorry if this was already posted, i'm looking for a flattener/reducer for my William Optics Zenithstar 66 SD (already asked WO by email) they reply me that since this product is discontinued over 10 years ago, i need to look for FlatII, FlatIII - with 2"sct thread Flat6a with 2"SCT adapter and i saw this one https://www.firstlightoptics.com/reducersflatteners/william-optics-adjustable-flat6a-iii-08x-reducer-flattener.html and this one https://www.aliexpress.com/item/32917167365.html but i'm not very sure, so i'll ask before buying anything i will use it on my recently buyed st
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The Lightwave 0.8x focal reducer gives an 0.8x reduction in F-Ratio for faster exposure times, as well as a correspondingly wider field for astro-photography. Designed primarily for refractor telescopes of F6 or longer focal ratios, however also known to work with RC telescopes. - Reduces and flattens phtographic field. - 38mm Clear aperture - Integral T-Ring adapter thread. - Requires back-focus of 55mm to CCD Chip. - For DSLRs a standard T-Thread adapter of approx. 10mm thickness is required. - The standard 2" OD barrel will fit any 2" format telescope like an eyepiece. - Th -
Used Altair Lightwave flattener, 0.8x Works well with f5.5-f8 refractors. Bit of marring as expected on the nosecone but optics in A1 condition. Includes postage £50 -
Hi, wow ive had more data in a week than the last year! Here is my take of the famous Triplet.. Thanks to a top stacking tip from Olly and Rob Ince.. 28 Lum 600 second 1x1 20 Red 300 second 2x2 20 Green 300 second 2x2 20 Blue 300 second 2x2 Stacked in Astroart , tweaked in Pixinsight & Photoshop..
