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12-12-2017, 07:35 AM   #1
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sigma 100-400 for k-1 ????????

well, guys and gals, im hearing great things for the new sigma 100-400. however, according to sigma there is no pentax mount AND no adapter for pentax k1, k3 etc. soooooo, im hoping my pentax gurus have a way around it and that there might really be and adapter of some sort.

12-12-2017, 07:52 AM   #2
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Nope.
12-12-2017, 07:57 AM   #3
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Not a chance.
12-12-2017, 08:18 AM   #4
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QuoteOriginally posted by mrfredsporty Quote
sigma 100-400 for k-1 ????????
not the right fl sorry

12-12-2017, 08:24 AM   #5
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There were Sigma 120-400s for Pentax though, you might be able to find one second hand.
12-12-2017, 07:11 PM - 1 Like   #6
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probably wouldn't focus accurately anyway.
12-12-2017, 11:55 PM   #7
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thanks to everyone

well, it was worth a try. if anyone could figure a way around it it would be you all. that is the one frustrating thing about k1 and k3; the limited sigma et al lenses.the camera is great, however
12-13-2017, 12:28 AM   #8
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You can go for the 150-500 and 500 f4.5 if you can find them, Fred.

The Pentax analogues would be the DFA 150-450 and DA 560.

12-13-2017, 06:03 AM   #9
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QuoteOriginally posted by clackers Quote
You can go for the 150-500 and 500 f4.5 if you can find them, Fred.

The Pentax analogues would be the DFA 150-450 and DA 560.
Or the 50-500.
12-13-2017, 09:24 AM   #10
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QuoteOriginally posted by normhead Quote
Or the 50-500.
Sure. We've got a few Bigma owners around here.
12-13-2017, 01:28 PM - 2 Likes   #11
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QuoteOriginally posted by clackers Quote
Sure. We've got a few Bigma owners around here.
More than 50% of the squirrel images on this site were taken with a Bigma.
12-13-2017, 01:48 PM   #12
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QuoteOriginally posted by normhead Quote
Or the 50-500.
QuoteOriginally posted by clackers Quote
Sure. We've got a few Bigma owners around here.
It does quite well, prior to getting it not long ago i used both versions of the 135-400 which is reasonable in price and quality.

BIGMA adds a lot of weight to the K-1 bag!
06-03-2019, 05:14 AM   #13
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Im think of getting this lens too. Would it work if you get this adapter:
K&F Concept Nikon F Lenses to Pentax K Camera Mount Adapter with Optic Glass

Last edited by Zooland; 06-03-2019 at 05:26 AM. Reason: More info added
06-03-2019, 05:48 AM - 1 Like   #14
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QuoteOriginally posted by Zooland Quote
Im think of getting this lens too. Would it work if you get this adapter:
K&F Concept Nikon F Lenses to Pentax K Camera Mount Adapter with Optic Glass
"Manually operated". No AF etc... Better get a 50-500, 120-400 or the Pentax 150-450...
06-03-2019, 07:58 AM   #15
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QuoteOriginally posted by MegamanAT Quote
"Manually operated". No AF etc... Better get a 50-500, 120-400 or the Pentax 150-450...
No way to control aperture either. Plus it's a short teleconverter, so a slow lens becomes even slower.
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