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10-30-2013, 09:30 AM   #1
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Samyang 14mm f2.8

Hello there,
Firstly, I apologise if I have not posted this is the correct place, I am new to this site. I am thinking about buying a wide angle lens for my Pentax k20d. It needs to be quite a fast lens, around f2.8, as I want to do some milky way shots with it too. I was looking at the generic Samyang/Bower/Rokinon 14mm lens. All I want to know is, can the aperture be controlled though my camera? I know it has an aperture ring, and I know that it is a manual lens. But I have seen on some blogs that it can be controlled in their camera. My other alternatives were the Pentax 14mm f2.8 or the Sigma 20mm f1.8. I would very much appreciate help on the Samyang matter and any recommendations with the lenses I have picked or any alternatives. Thank you very much in advance,
Lorien Barker.

10-30-2013, 09:42 AM   #2
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If it is for Pentax it will have an A setting on the aperture ring. Put it on the A setting and you can control the aperture via the camera dials.
10-30-2013, 09:52 AM   #3
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Yes. This is an A lens so open aperture metering works. It is not chipped so you have to enter the focal length manually, and flash automation is limited.

The bonus is that it is a full frame lens and I use it on my film cameras.
10-30-2013, 11:33 AM   #4

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Welcome to PentaxForums.

The Samyang/Bower/Rokinon/Vivitar/etc 14mm f2.8 is a popular lens for astrophotography. The aperture can definitely be controlled by Pentax cameras.

10-30-2013, 01:14 PM   #5
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There was a comparative review of the Pentax 14mm against the Samyang 14mm here on Pentaxforums a while ago. I remember they found the Samyang sharper at infinity focus, while the Pentax was the better at close focus.

There's also a Samyang 16mm f/2.0.
And a Samyang 24mm f/1.4.
The faster the pricier though.

11-05-2013, 11:07 AM   #6
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It is my preferred wide-angle lens, sharp, rich in contrast, and very easy to use!

Samyang 14mm 1:2.8 ED AS IF UMC - a set on Flickr

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