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View the Latest Correctors, Focal Reducers & Flattener Reviews

Item
Submitted By
Celestron f/6.3 Reducer Corrector # 94175
Celestron f/6.3 Reducer Corrector # 94175
5.0
Worked as expected. A happy owner.
Focal reducer works perfectly with my C6. Now I can have a shorter focal length on scope. Also Perfect for my basic wider view astrophotography..
Meade Series 4000 f/6.3 Focal Reducer/Field Flattener for SCTs # 07545
Meade Series 4000 f/6.3 Focal Reducer/Field Flattener for SCTs # 07545
5.0
Excellent focal reducer/flattener
Bought this for a Meade ETX125 on the recommendation of a number of ETX125 users and very pleased with the results for astrophotography. Excellent quality of build and optics.
Celestron f/6.3 Reducer Corrector # 94175
Celestron f/6.3 Reducer Corrector # 94175
5.0
Very happy
After a lot of research and reading lots of reviews to compare the Celestron with other brand products that apparently come out of the same factory, I decided to pay a bit more to get the Celestron one. I'm not disappointed. Nice clean optics, g...
GSO 1.25
GSO 1.25" 0.5x Focal Reducer
3.0
Not for Lower Power Eyepieces
I found the GSO .5 reducer to be well made, with good coatings and light throughput. However, while it performed as advertised in mid-focal length eyepieces, it produced significant vignetting on my 24mm and 30mm. The result was a lower magnification...
GSO 1.25
GSO 1.25" 0.5x Focal Reducer
5.0
Well made optic
Nice focal reducer at a good price.
Baader 2
Baader 2" MPCC Multi Purpose Coma Corrector - New MkIII Version # MPCC 2458400
5.0
correct coma without adding CA
i was using a GSO coma corrector with my 8" F4 GSO Newtonian for astrophotography. it worked good for coma correction but it also introduced some heavy chromatic aberration to the image. so i have decided to try this. its twice as expensive and ...
GSO 2
GSO 2" 0.5x Focal Reducer
5.0
Focal Reducer
Great quality
HoTech 2
HoTech 2" SCA Field Flattener with T-Thread for f/5 - f/8 Refractor Telescope # FF582
5.0
Good product
t was used with Vixen ED-103S.
The surrounding stars are well revised.
It is good that the screw of M42 is a little longer.
Baader 2
Baader 2" MPCC Multi Purpose Coma Corrector - New MkIII Version # MPCC 2458400
5.0
Great quality
Works as promised! Thanks Agena!
Baader 2
Baader 2" MPCC Multi Purpose Coma Corrector - New MkIII Version # MPCC 2458400
5.0
woke up from a coma (corrector)
i tried another coma corrector, and it actually made coma where there weren't any. In contrast, the Baader Mark III coma corrector worked VERY WELL. I use both a 6" f5 and an 8" f5 orion reflector telescopes, and coma correction made a...
GSO 2
GSO 2" Photo-Visual Coma Corrector for Newtonian Telescopes
4.0
Vague back focus distance (70-75
Vague back focus distance (70-75 mm) and need to purchase additional spacers to get optimal performance is the main concern.
GSO 2
GSO 2" 0.5x Focal Reducer
5.0
2 inch focal reducer
Works great with my Evolution 8 to utilize my Atik Infinity.
HoTech 2
HoTech 2" SCA Field Flattener with T-Thread for f/5 - f/8 Refractor Telescope # FF582
5.0
Agenda field flattener
Stars are sharp. Solid construction.
Baader 2
Baader 2" MPCC Multi Purpose Coma Corrector - New MkIII Version # MPCC 2458400
5.0
I works great. Wish I
I works great. Wish I bought it sooner
GSO 2
GSO 2" Photo-Visual Coma Corrector for Newtonian Telescopes
4.0
Great with a spacer ring!
Spectacularly flat view on my GSO 12" Dobs, especially with ES 82 degree 30mm. Knocking off one star because it needs an extra spacer ring to work properly. A 3/4" spacer (plus existing parfocalizing ring on the eyepiece) did the trick for ...
GSO 2
GSO 2" Photo-Visual Coma Corrector for Newtonian Telescopes
4.0
Useful but not essential. Hard to use
First off, make sure you buy a set of spacers with this coma corrector. This product requires ~75mm from image plane to the corrector. For imaging with a DSLR, this is usually a single 20mm spacer. There are no directions provided with this item. I ...
GSO 2
GSO 2" Photo-Visual Coma Corrector for Newtonian Telescopes
5.0
great value for money
recently bought one to be used with GSO 8" F4 scope and nikon D5300 DSLR. i can see very good results with it. more details on how i connected it to DSLR and results can be found here. http://www.astronomyforum.net/astro-imaging-forum/246218-ast...
HoTech 2
HoTech 2" SCA Field Flattener with T-Thread for f/5 - f/8 Refractor Telescope # FF582
5.0
High quality tool!
I haven't had the chance to test it, the quick once over looks very impressive, well controsted and good looking! It makes my filter wheeler and telescope look very elegant .., thanks.. Rich
GSO 2
GSO 2" Photo-Visual Coma Corrector for Newtonian Telescopes
5.0
I like your company
Good price and everything was as advertised. Came on time and in great shape. This is the third item purchased recently and all have met my expectations.
Tele Vue DIOPTRX Astigmatism Corrector - 3.50 # DRX-0350
Tele Vue DIOPTRX Astigmatism Corrector - 3.50 # DRX-0350
5.0
Super crisp pinpoint stars
I called TV support about my concerns regarding my new TV31 Nagler, all stars were elongated - not pinpoint like my higher power EPs (5-17mm) I thought something was wrong with my new $650 Nagler - VERY dissapointed to say the least! TV explained &am...