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View the Latest Correctors, Focal Reducers & Flattener Reviews

Item
Submitted By
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...
William Optics 2
William Optics 2" 0.8x Reducer / Field Flattener 6A for GT102 Telescope # P-F6A-GT102
5.0
William Optics GT102 Reducer/Flattener
I purchased the William Optics GT102 reducer/flattener for use with an Explore Scientific ED 102 F/7. Coupled with a Canon EOS T5, image is correct across the entire field with no vignetting. I could not be happier with the results.
GSO 2
GSO 2" Photo-Visual Coma Corrector for Newtonian Telescopes
4.0
gso coma corrector
Works well visually, cleaned up 70-80% of field with my previously nasty inexpensive 2" eyepieces in my 5" f5 scope. Needs a spacer ring to work properly with my Nikon dslrs- 1/4" I bought here looks good on initial testing, I've ...
GSO 2
GSO 2" Photo-Visual Coma Corrector for Newtonian Telescopes
5.0
Excellent Coma Corrector
An essential piece of equipment for imaging with a Newtonian astrograph telescope. Virtually eliminates all appearance of coma in DSLR images. Very pleased with the performance and quality of this product. Highly recommend it. There are other, much m...
GSO 1.25
GSO 1.25" 0.5x Focal Reducer
5.0
Good Quality
Threaded on both ends for additional filters. Solid. Good optics.
GSO 1.25
GSO 1.25" 0.5x Focal Reducer
5.0
Funtional optics
I ordered this magnification reducer because I couldn't get lenses for my 102 mm Maksutov Cassegrain telescope that would pull the entire sun into view for the eclipse. I needed to reduce the effective focal length of the telescope so I could ge...
GSO 1.25
GSO 1.25" 0.5x Focal Reducer
5.0
GSO 1.25" 0.5x Focal Reducer
Good quality. Crisp images. Thank you Agena for your fast shipping, handling and service!
GSO 1.25
GSO 1.25" 0.5x Focal Reducer
5.0
Focal Reducer
Works as advertised. Arrived on time. Good product
Celestron .7x Reducer Lens for EdgeHD 1100 # 94241
Celestron .7x Reducer Lens for EdgeHD 1100 # 94241
5.0
Great product
Works just as advertised, giving a sharp increased field of view through my Celestron 11" SCT.
GSO 1.25
GSO 1.25" 0.5x Focal Reducer
5.0
Great quality and service
Impressed with the quality of the product but I had to return it as it didn't match my telescope. Impressed with the response from the customer service and quick refund.
Tele Vue DIOPTRX Astigmatism Corrector - 0.75 # DRX-0075
Tele Vue DIOPTRX Astigmatism Corrector - 0.75 # DRX-0075
4.0
Astigmatism corrector
Does a nice job for astigmatism correction, particularly with faster a (F5) focal ratio. The adaptor required to use with a Panoptic 24 is easy to install. I have used Agena a few times and they have always provided excellent service.
William Optics 2
William Optics 2" 0.8x Reducer / Field Flattener 6A for GT71 Telescope # P-F6A-GT71
5.0
William Optics GT71 Field Flattener f/6
Sharp images from edge to edge, works with full frame cameras with minimal vignetting.
HoTech 2
HoTech 2" SCA Field Flattener with T-Thread for f/5 - f/8 Refractor Telescope # FF582
5.0
Awesome field flattener!
I use this with my Borg 76ED apo refractor (f/6.6), which had some really bad field curvature with my APS-C DSLR. Now I have pinpoint stars out to the very edge! It screws into my Nikon's T-ring, and then slides into a 2" eyepiece socket, a...
GSO 2
GSO 2" Photo-Visual Coma Corrector for Newtonian Telescopes
5.0
GSO Coma Corrector
I rate this product with 5 stars, because it works great. But it is MANDATORY that you order a 25mm tube extender for it, otherwise it will not work in focus. The lens-to-eyepiece distance has to be close to 75mm, and the corrector only supplies 2 in...
GSO 1.25
GSO 1.25" 0.5x Focal Reducer
5.0
GSO Focal Reducer
Absolute first rate. The reducer appears to be high quality, nice coated lenses, and works as it should. The shipping was extremely fast!! I will check for availability at Agena first from now on when I need any telescope part.