Kimball Corson Reviews
Great Little Lens
This 9mm is better than its predeceor in regard to contrast especially, and also sharpness, but to a lesser degree. It is a little and light lens that is great for smaller lightly balanced dobs and compact refractors.
A Work Horse
A great staple. Narrow field of view bothers me. Great light thru put with so few elements. A poor mans substitute for the 31 Nagler or 35 panoptic, unless you have a binoviewer.
Ring Around the Collar
This lens is a work in progress. Used in daylight, one can see a large and thick orange band at the periphery of view which is preclusive of terrestial use because of its annoyance. Al only gets away with it at night and even then the field of view to too large for the brain and eye to accomadate. I sent mine back within 24 hours. If Al solves the ring around the collar problem, the current version might become a boat anchor.
Dynamite in a Small Package
A terrific, compact and light weight lens that has it all and is remarkable in all material regards. One of Als best.
Hold Your Head Still
This lens is a ten, but only for those who can hold their head still to avoid what for me is a truly minor black out problem that a few others find isimpossible. Must try it first. Great contrast, resolution, and apparent sharpness.
A Black Out Problem
See my review of the 22mm Nagler. Further, this lens has less contrast and apparent sharpness that the 22 nagler. Nevertheless, I like the eyepiece.
Really a 9.5
A great wide-field lens. 68 degrees is about all us mortals can see and mentally process after a fashion at this focal length in most scopes. Does not have the orange ring problem of the 31mm nagler and is a much better buy. The middle position between the 31mm nagler and the 32mm TV plossl. The sensible course.
Peas in a Pod: really 9.5 for all Three
The new 9mm, 7,, and 5mm naglers are peas in a pod. Light, compact, contrasty, sharp, but with minimal eye relief you can think is just right (if you dont wear eyeglasses or have long greasy eyelashes) or too little (if you do).
A Fabulous Lens
One of Als best, optically. Relaxed, contrasty and sharp, it is better than the 35mm or 22mm panoptics. Easy to use. Good eye relief. Just a fabulous lens. Non optimal focal length for most scopes, but is still a real gem. Sorry I sold mine.
Very Contrasty Views
Fabuluous contrast and apparent sharpness, but does not provide a relaxed comfortable view. Black out will be a problem for some.
To Barlow or Not to Barlow
This is a great barlow . . . if you like barlows.