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03-22-2014, 01:00 PM   #61
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QuoteOriginally posted by Na Horuk Quote
Isn't the Nikon version more expensive because it requires some sort of chip?
That being said, I would love it if the K-mount version would submit focal length data..
Yes, there is a chip so that entry-level Nikon cameras can meter exposure. The Nikon terminology for such a lens is Ai-P. You will find the same chip in Zeiss ZF.2 lenses.


Last edited by Mistral75; 03-22-2014 at 01:06 PM.
03-22-2014, 01:09 PM   #62
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Good thing the K-mount doesn't need anything like that! the barest K-mount is pretty simple and still allows a lot. But as I said, if only the Samyang lenses could communicate focal length data
03-22-2014, 02:08 PM   #63
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QuoteOriginally posted by Na Horuk Quote
Good thing the K-mount doesn't need anything like that! the barest K-mount is pretty simple and still allows a lot. But as I said, if only the Samyang lenses could communicate focal length data
The Nikon F mount doesn't need it either. It's'a mere software-induced limitation of entry and mid-level Nikon DSLRs: no chip, no metering.

The same applies to all Nikon 1 cameras, hence the very low use of adapters with these cameras (you have to shoot in manual mode, look at the histogram, modify your settings, shoot again, look again at the histogram and so on).

Talk about crippling one's camera...
03-22-2014, 10:39 PM   #64
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QuoteOriginally posted by Na Horuk Quote
Good thing the K-mount doesn't need anything like that! the barest K-mount is pretty simple and still allows a lot. But as I said, if only the Samyang lenses could communicate focal length data
Hm I'll have to check again, but I was thinking the 8mm and 85mm I own DID communicate FL

03-24-2014, 03:14 AM   #65
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QuoteOriginally posted by ToyTank Quote
Hm I'll have to check again, but I was thinking the 8mm and 85mm I own DID communicate FL
My 24 TS sure doesn't, and I would doubt any 8mm lens would pass FL info, since Pentax only registers FL starting at 10mm and up.

Wim
03-24-2014, 03:39 AM   #66
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+1, the Sigma 8-16mm doesn't transmit FL under 10mm
03-24-2014, 07:45 AM   #67
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QuoteOriginally posted by Ishpuini Quote
My 24 TS sure doesn't, and I would doubt any 8mm lens would pass FL info, since Pentax only registers FL starting at 10mm and up.

Wim
I just checked and you are correct on the 8mm. I have SR off by default, and the my K30 only asks for FL when I turn SR on.
03-24-2014, 07:54 AM   #68
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QuoteOriginally posted by Zygonyx Quote
+1, the Sigma 8-16mm doesn't transmit FL under 10mm
Yea, and that sucks because lens corrections, which are so valuable with an ultra, ultra wide like 8mm, use the focal length from the exif data.
There is a work around, but it just adds time to the workflow.

03-24-2014, 09:11 AM   #69
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I haven't checked, but don't think DxO is blocked with exifs "blanks" ?
03-25-2014, 06:22 AM   #70
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QuoteOriginally posted by cali92rs Quote
Yea, and that sucks because lens corrections, which are so valuable with an ultra, ultra wide like 8mm, use the focal length from the exif data.
There is a work around, but it just adds time to the workflow.
Yep this is annoying, as are certain (all?) Sigma lens not correctly recognized by Lightroom (Sigma 28/1.8).
Confusing if you also have the F28/2.8..
03-25-2014, 12:11 PM   #71
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QuoteOriginally posted by VisualDarkness Quote
Sell my new Pentax DA 14/2,8 and buy this? I think I stay with the 14mm, I already struggle with the wideness of that lens and the 10mm doesn't take filters. But tempting indeed!
I agree with you. I have a Sigma 10-20 that i don't use anymore. About 17 to 21 is about as wide as i will go. Some people seem to be able to use UWA effectively - but not everyone IMHO.
03-26-2014, 03:04 PM   #72
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B&H had the 10mm f/2.8 listed as available March 25, but now just shows pre-order. I'm still waiting for my second copy of the 16mm f/2. Hopefully soon.

I cannot find the 10/2.8 anywhere else as it seems B&H is the sole dealer for this lens in the USA.
03-26-2014, 04:25 PM   #73
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Adorama has it listed under the Rokinon brand. It always seems like the Rokinon versions are more available here in the US. I don't know if it is *really* available though. As for the Samyang at B&H, it is still vaporware for now, since the 25th availability date has come and gone and there's nothing (I have it on pre-order myself).
04-05-2014, 08:09 PM   #74
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FYI "Bestpriceoptics" on Ebay apparently has 4 in stock BIN $530 OBO. I don't see anyone else having any in stock. I've bought from Bestpriceoptics good ebayer

oh I should add a linky
04-09-2014, 11:59 AM   #75
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Showing as "In Stock" now at B&H.
Rokinon 10mm f/2.8 ED AS NCS CS Lens for Pentax K Mount 10M-P
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