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03-12-2009, 03:11 AM   #16
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palmor's Avatar

Join Date: Dec 2006
Location: North of Boston, MA
Posts: 798
The DA*300 holds up VERY well with a 1.5x TC IMO. All these taken with that combo.

John


Pentax K20D ,Pentax smc DA* 300mm f/4 ED (IF) SDM
1/200s f/8.0 at 450.0mm iso400 (with Kenko 1.5xTC)


Pentax K20D ,Pentax smc DA* 300mm f/4 ED (IF) SDM
1/1000s f/8.0 at 450.0mm iso200 (with Kenko 1.5x TC


Pentax K20D ,Pentax smc DA* 300mm f/4 ED (IF) SDM
1/100s f/5.6 at 450.0mm iso1600 with Kenko 1.5xTC


Pentax K20D smc DA* 300mm f/4 ED (IF) SDM
1/320s f/6.3 at 450.0mm iso400 (with Kenko 1.5xTC


03-12-2009, 08:17 AM   #17
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Location: League City, Texas
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Posts: 35
John, which TC do you use, and do you have problems with 'hunting' before the focus locks on?

Ed

Edwin D Hutchinson Nature Photography
Dane PhotoImagery's Photo Galleries at pbase.com
03-12-2009, 08:26 AM   #18
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QuoteOriginally posted by e_hutchinson Quote
John, which TC do you use, and do you have problems with 'hunting' before the focus locks on?

Ed

Edwin D Hutchinson Nature Photography
Dane PhotoImagery's Photo Galleries at pbase.com
I have the Kenko 1.5x TC and I really don't have much issue with AF. It is slower then without the TC of course but I don't get a lot of hunting really. There have been people with the same exact TC that have had issues so I don't know if there are variations in the TC/Lens/Camera or what that would make it hunt more/less. Oh why did Pentax have to take there 1.4x TC off the roadmap!

To be more specific I have this TC



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