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View the Latest Correctors, Focal Reducers & Flattener Reviews

Item
Submitted By
GSO 2
GSO 2" 0.5x Focal Reducer
5.0
Eye Opening
I bought this 2" Focal reducer to give me more options when operating my camera for DSO imaging. I have not had a chance to use it yet because of the clouds, rain and cold temps up here in New England. It will give me F/5 straight up using my C8...
GSO 2
GSO 2" Photo-Visual Coma Corrector for Newtonian Telescopes
5.0
FIRST EXPERIENCE A GREAT ONE!
I purchased several GSO scopes from Agena. Two of the fast scopes, f:6 and f:5 in different apertures, showed a bit of coma, not untypical for fast RFT reflectors regardless of aperture. In the good old days, having owned fast Newtonians in the past,...
Celestron f/6.3 Reducer Corrector # 94175
Celestron f/6.3 Reducer Corrector # 94175
5.0
AgenaAstroProducts
Bad weather has prevented me from using this item so I'll comment on Agena Astro Products. I've recently purchased a new scope and purchased quite a few quality accessories from four different companies to complement the scope. Agena Astro ...
GSO 2
GSO 2" Photo-Visual Coma Corrector for Newtonian Telescopes
4.0
Good Coma Corrector, Better for Astrophotograpy
I bought to use with a 2" eye piece, seems to be very well built
Celestron f/6.3 Reducer Corrector # 94175
Celestron f/6.3 Reducer Corrector # 94175
5.0
Great purchase
A great product from a great vendor.
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 ...