Do we still need a TC?

Started Nov 11, 2013 | Discussions thread
paulkienitz
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Re: Do we still need a TC?
In reply to viking79, Nov 11, 2013

viking79 wrote:

I did a resolution test of an SMCP-A 50mm f/1.7 and a Vivitar 2x macro focusing extender, and the TC was much better than cropping to 100 mm field of view. This was on a 16 MP Sony NEX camera, K-3 might differ for crop, but not enough to match the TC.

That sounds promising.  I have one of those Vivitar 2x Macro things in OM mount, and it got quite blurry when I put it behind the long end of a 28-200 zoom, but it seemed to work well enough when converting my 50/1.8 into a 100/3.5 macro.  If even as dubious a teleconverter as that is still doing good work on a K-5, then the K-3 can probably still benefit from the coming AF RC.  I may have to get one with a DA* 300, since Pentax isn't offering a 450/5.6 or the like.  Of course, first my budget has to recover from buying the K-3 after I just had to replace my car.

 paulkienitz's gear list:paulkienitz's gear list
Pentax Q Pentax K-3 Pentax smc DA 55-300mm F4.0-5.8 ED Pentax smc DA* 300mm F4.0 ED (IF) SDM Samyang 8mm F3.5 Aspherical IF MC Fisheye +3 more
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