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

Started Aug 24, 2014 | Discussions thread
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brandrx Forum Pro • Posts: 28,211
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.

Cheers.

Ron

-- hide signature --

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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