K-3 + Sig 50-500mm + 1.4X (4 imgs)

Started Aug 24, 2014 | Discussions thread
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brandrx Forum Pro • Posts: 28,337
K-3 + Sig 50-500mm + 1.4X (4 imgs)

Hi folks,

I made a quick check using the K-3 + Sigma 50-500/4.5~6.3 APO DG OS HSM (at 500mm) + Pentax 1.4X HD AW teleconverter. Note #1: CDAF does not work worth a damn with this rig. Note #2: I am certain that a Tamron-F 1.4X Pz_AF or a Kenko 1.5X Pz_AF would work almost as well.

(1) - The focal length and aperture is not corrected to the camera.

(2) - Although I am showing images that I took handheld, using the OS on the lens set to position #1, I suggest you use a tripod.

(3) - It is best to manually pre-focus the lens to near focus before trying to autofocus. Else just use Catch-in-Focusing (CIF).

(4) - It appears to me that aperture selection of f/8, f/9, or f/10 is best.

(5) - IMO the images are quite usable. Make of them what you will. YMMV.

Subject about 325 feet.

Subject about 300 feet.

Subject about 50 feet.

Subject about 130 feet.



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Ron - 'We don't have time to go take pics this afternoon Carl.'
Carl - 'What do you mean? It will only take 1/1000s.'
'Keep your eyes looking forward. However, glance back now and then to see where you've come from. It will put a smile on your face.' ~ brandrx

Pentax K-3
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