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09-21-2013, 08:42 AM   #1
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Reversed Lens for K30 (52mm)

Hello pentaxians, recently i bought a not so expensive branded reverse ring, i planned to use it on my DA 50mm 1.8
Unfortunately, later i realized having a DA lens reversed is a pretty dumb idea since i cant control the aperture manually. (no aperture ring)
So i bought a manual lens SMC M 50mm 1.4 together with a 49mm reverse ring.
Now, for some reason, i really need to use my reverse ring with 52mm, the problem is most of the manual lenses ive seen that can control the aperture manually have 49mm filter thread.

Is there a Prime manual lens that has a 52mm thread? or a 52mm thread zoom lens that is good for reverse macro?

Looking forward to your advice...Thank you guys.

09-21-2013, 08:55 AM   #2
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Just use a 49 to 52 step-up ring.
09-21-2013, 12:19 PM   #3
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QuoteOriginally posted by rp_dxn Quote
Is there a Prime manual lens that has a 52mm thread? or a 52mm thread zoom lens that is good for reverse macro?
There are many. Remember, that when reversed you are not limited to K-mount lenses. 52mm is a very common filter size. If you want to stay in the Pentax fold, check out the Pentax-K series in the lens review section of this site.


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09-21-2013, 02:19 PM   #4
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The aperture thing is a problem I'm finding even on lenses with the ring (I have old A series lenses). Trouble is when doing macro you generally want small aperture because DOF is so shallow wide open. However, if you set small aperture your focus screen is black. Therefore what you could try doing on your DA lens is to manually pull the little lever to opens the blades while you focus then let go when you shoot. That's ok as long as you are happy to shoot smallest aperture of course. Otherwise you need a lens you can set manually.

09-22-2013, 03:00 AM   #5
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hmmm i tried finding a K lens on ebay but.....
maybe ill just use a step up ring as suggested above.

Thank you guys for the suggestions.
09-22-2013, 03:41 AM   #6
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Long ago Ricoh made K mount lenses (before they got their special and problematic pin) with 52mm filter thread and K mount. I had an Rikenon 50/2 like that which came with my XR500. After that the MX with M50/2 it seemed such an elegant small camera.
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