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10-17-2009, 12:00 PM   #1
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Reverse Lens Macros with 28mm/2.8 A

Handheld with K100D. Minimum aperture (aperture lever released just before pressing the shutter). Also stacked a UV filter and a +2 closeup filter, lit with AF360FGZ.

Rosehip:


Apple:



10-17-2009, 01:29 PM   #2
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Here's one I did with the A28/2.8 reversed on a 150mm lens.
You are looking at a computer screen.
That is the full 35mm frame.
10-17-2009, 07:24 PM   #3
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Wheatfield, that's prety neat. Heres an M 28mm f/3.5 on a K 80-200mm at 200. The spine of a feather (not sure the technical term).

10-17-2009, 07:41 PM   #4
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I'm not sure I follow:

Are you all "stacking" lenses? What allows for that? A reversal ring/adapter and/or what else?

10-17-2009, 07:54 PM   #5
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There are two types of reversing adaptor.
One has a camera bayonet mount on one side and a filter thread on the other, the other type has a camera filter thread on both sides.
The first allows the lens to be mounted in reverse to a body flange (either camera, bellows or extension tube), the second allows one lens to be mounted in reverse to another lens.
Reversing one lens onto another can produce very large magnifications. Note that the shorter focal length is put in front of the longer one in a lens to lens reversing set-up.
On the set-up that I used for my computer monitor picture, I was also using a bellows to increase magnification even more.

Nick, that's a nice shot of the feather. You used the narrow depth of field to great advantage.
10-17-2009, 08:48 PM   #6
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Interesting how the blue dots on the computer screen shot are so shifted, compared to the red/green pixels. Have you estimated or calculated what the magnification is on that shot?

Neat shots.
10-17-2009, 08:57 PM   #7
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QuoteOriginally posted by Fixcinater Quote
Interesting how the blue dots on the computer screen shot are so shifted, compared to the red/green pixels. Have you estimated or calculated what the magnification is on that shot?

Neat shots.
I figure between 7 & 8 x magnification, but I don't know for sure that my math is correct.
10-18-2009, 04:40 AM   #8
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Reverse stacking lenses has been taken to extremes, have a look at the macro setup and amazing results acheived with it here:
https://www.pentaxforums.com/forums/everything-else/13422-macro.html
https://www.pentaxforums.com/forums/post-your-photos/65538-waterfleas.html
I think i'l have to try this, time to go look for some lens to lens reverse adapters...

10-18-2009, 08:48 PM   #9
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Thanks Wheatfield - I confess it was trial and error, for the most part. xixco, I put a 49mm UV filter face-to-face with a 52mm UV filter and they kind of snapped together. So then I screwed a lens onto the back of each, and mounted the longer one. The long range plan is to knock out the glass of teh filters and glue the rings together, but as a first attempt I just held it gingerly and shot over a bed. You can also buy a variety of male-male filter rings of eBay from China.
10-26-2009, 12:08 PM   #10
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I guess the shorter the focal length, the higher your magnification when reversed. I reverse the 50mm as well, with less "magnificant" results

I used the kind of reverse ring that mounts onto the camera. Makes the 28mm a pretty versatile lens! Controlling the aperture lever with your finger and doing everything handheld takes some coordination, but it seems like a great payoff for a $15 adapter.

It got me my most popular shot (although that could just be because it is red :-)



Stacking onto a telephoto looks like a great idea - I'll have to look for one of those adapters.
10-26-2009, 04:19 PM   #11
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Taken with a 50mm M f2 with a reversed nikon 50mm f1.8 series E taped on the front with electrical tape. Reversing lenses gets you really close!
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