I want to get to 600mm using my 300mm f/4 edif. I am prepare to loose autofocus but I want to loose the less image quality possible. And yeah $$$ does matter. Any suggestions?
#1. "RE: 2x Teleconverter" | In response to Reply # 0BJNicholls Charter MemberFri 16-Mar-01 02:31 AM
The Kenko/Tamron Pro converters will maintain AF and are reported to work very well:
In my testing with my 70-300 ED Nikkor zoom, the Nikon TC-201 was sharper and didn't produce the color fringing that I saw with the same lens and the Tamron 2X Pro converter.
#2. "RE: 2x Teleconverter" | In response to Reply # 1karlmarx Basic MemberSat 17-Mar-01 04:18 AM
Thank you very much for your link BJ, it was very helpfull! I am now into questionning myself wether to get the Tamron/kenko pro 2x or the tamron/kenko pro 1.4x...
I would like to get to 600, but a 420 with autofocus would be nice... I think I'll go to my local shop, asked to try them on my camera and lens and see what difference it makes in the viewfinder (and check the speed of autofocus with the 1.4x). I might even take some shot and see what it yield... if they let me...
Have a good time.
#3. "RE: 2x Teleconverter" | In response to Reply # 2f5fstop Basic MemberSat 17-Mar-01 11:53 AM
I use the Kenko Pro 300 2X TC with my Nikkor 300mm F/4 ED IF lens and do not seem to have the same problem that BJ has with the zoom lens and the Tamron TC. In fact, I have not seen it while using the TC with my 80-200 F/2.8 Nikkor.
If I had the 70-300 I would be curious to see if it appears.
Taken with Kenko Pro 300 2X and 300mm. Focus is tricky, and it appears I have a better focus on the tree than the bird, but this was my first use of the TC with the 300mm
--Take only photographs, leave nothing but footprints--
And carry plenty of FRESH batteries...
"Take only photographs, leave only footprints"
#4. "RE: 2x Teleconverter" | In response to Reply # 3BJNicholls Charter MemberSat 17-Mar-01 11:07 PM
My wife and I spent the day looking at spotting scopes. It's very apparent that the 70-300/Tamron is showing chromatic abberation. It was easy to see in lower line non-ED scopes, blue-purple fringe on one side, yellow on the other. For whatever optical reasons, the Nikon TC-201 didn't produce the same effect.
I'll have to try it on the Sigma 50-500 and see if the same thing happens. Now I have three 2X converters to confuse myself with.
By the way, we just placed an order for a Nikon Fieldscope III ED A. After our research, it appears to be the best 60mm scope made.