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Forum: Pentax K-1 & K-1 II
05-24-2016, 06:17 PM
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Updated to v1.10 firmware and went out photographing birds last Saturday morning. - Issue appears to be resolved for me. No more weird exposure issues when shooting HiSpeed sequences.
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Forum: Pentax K-1 & K-1 II
05-15-2016, 05:08 PM
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Needed to do a session with the K-1 on the weekend. I show dogs and also get official photographer duties some weekends.
Last weekend I found my K-1 incorrectly adjusting the shutter speed when shooting Hi speed in Av mode. I'm yet to go through the 2,000 plus images from the weekend fully but here's what I have so far.
K-1 (no D-BG6 grip) in Av mode, Hi speed, WB - daylight, crop manually set to FF, center weighted metering, AFC, back button focusing (no focus on shutter button), DA*55 lens (gives slight vignetting on FF but images usually get cropped). I would shoot a continuous sequence and the first frame would be correctly exposed but then the shutter speed would start increasing in subsequent frames all the way up to 1/8000 giving me a series of underexposed images (nearly like doing a bracket exposure going 0EV, -1EV, -2EV but I'm not in bracketing mode). Tonight I hope to go through the images to see if I had this issue at all while using the Sigma 70-200 - definitely with the DA*55 but not sure on the other lens I used on the weekend from memory.
An Update: checking through my images I had the same issue intermittantly with the Sigma 70-200 EX DG OS HSM. Found a 5 frame sequence ISO at 200, F4 - 3 frames at 1/640 then strangely stepped to 1/1250 next frame and then to 1/2000 the frame after. No change to subject or lighting.
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