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Trying my 645 FA 55-110 mm f/5.6 zoom on my new K3 III @ 55, 80 and 110 mm + f/16
Lens: 645 FA 55-110 mm f/5.6 Camera: Pentax K3 III Photo Location: Quebec, CANADA ISO: 200 Shutter Speed: 1/90s Aperture: F16 
Posted By: RICHARD L., 08-10-2022, 04:38 PM

I tried my 645 FA 55-110 mm f/5.6 on my K3 III handheld @ f/16, 55 mm, 80 mm and 110 mm FL, aiming at my neighbor's Maple tree. It makes for a heavy lens but images are quite good on this 26 Mpx APSC sensor.

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08-10-2022, 04:54 PM   #2
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Looks good at all ranges. When using this lens, is it all manual focus?
08-10-2022, 05:17 PM   #3
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You have to "enable aperture ring" use in the MENU section, utilize the Av auto-exposure mode and focus manually, plus using the '645 to K-mount' adapter. You lose all automation and expose with a stopped-down diaphragm opening, making for a dark viewfinder image. I didn't want to use a tripod because the lens is heavy and has no tripod foot, so I feared the strain on the K3 III might damage the bayonet mount of the camera. Nice results anyway but not a combo you will use everyday (K mount FA, DA and DFA lenses provide perfect automation and are lighter and better balanced). The picture @ 80 mm FL seems to be the sharpest of the three.
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camera, f/16, f/5.6, fa, fa 55-110 mm, iii, k3, k3 iii, mm, mm f/5.6, photo, québec
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