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12-14-2012, 12:06 PM   #1
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Anyway to set aperture of the Tamron 70/200 f2.8 / got the wrong asapter for my Q

Hi, i just received my Pentax Q and a couple of adapters, i had ordered the Fotodiox one WITH aperture control, but got the one without it, i wanted to try out my Tamron 70/200 f2.8 which has no aperture dial, i read that it is possible to mount a lens without aperture dial on a DSLR body, set it to 2.8 or 4 and than take the lens of to have it set to that articular aperture... but mine stays closed all the way even if i set it to 2.8 with my K7... any thoughts... i cant return the adapter because i git it send to me by my brother in law (i live in Colombia)...

Thanks

12-14-2012, 12:13 PM   #2
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QuoteOriginally posted by mgbirder Quote
Hi, i just received my Pentax Q and a couple of adapters, i had ordered the Fotodiox one WITH aperture control, but got the one without it, i wanted to try out my Tamron 70/200 f2.8 which has no aperture dial, i read that it is possible to mount a lens without aperture dial on a DSLR body, set it to 2.8 or 4 and than take the lens of to have it set to that articular aperture... but mine stays closed all the way even if i set it to 2.8 with my K7... any thoughts... i cant return the adapter because i git it send to me by my brother in law (i live in Colombia)...

Thanks
Unless you feel comfortable with taping the aperture lever in place, I don't think there's any way to get the lens to stop down with that adapter.

Adam
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12-14-2012, 01:24 PM   #3
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QuoteOriginally posted by Adam Quote
Unless you feel comfortable with taping the aperture lever in place, I don't think there's any way to get the lens to stop down with that adapter.
thanks, i tried that, it works, but i think will have to buy another adapter ...
12-14-2012, 02:06 PM   #4
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Yes sorry to hear that you received the wrong one.
The aperture control is spring loaded so it will always return to the closed position.
I no longer have my Fotodiox but perhaps there is a way to install a protuberance in the correct position on the adapter so that when you attach it to the lens it will catch the aperture lever and open it.
Would require much care and exactness to not damage the lens.

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