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Message: <blockquote data-quote="Paul Corfield" data-source="post: 1846418" data-attributes="member: 19132">When I re-did the money photos I noted that my small Antares Apo barlow and my 2" GSO barlow were a bit soft in the corners and I wondered if this was because I have them mounted very close to the camera. I moved them further away from the camera to the sort of position they would be if used with an eyepiece and that produced sharp photos in the corners. I had them mounted flush to the camera body but for these images I put a 40mm macro tube between them and the camera and this is roughly where they would be if screwed into the front of the MAX DSLR or T-ring/scope adapter.Here's 100% crops of the bottom right hand corner of the photo and information written on each image. Range for all of them was about 7m (23 feet)I think for the money the Kenko 1.4X is excellent. The 2" Antares 1.6X (2.3X on scope) is also pretty sharp to the corner. The other two are good value for the price, the Antares Apo is perfectly corrected for CA in the middle of the image but a little creeps in at the corners and the other three are possibly better in this respect.Paul.</blockquote>