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Thread started 28 Mar 2008 (Friday) 05:30
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MPE-65 vs reversed 50mm

 
LordV
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Mar 28, 2008 05:30 |  #1

I used to use a reversed 50mm pentax lens on my sigma 105 before getting an MPE-65. Since then I've learnt a bit more about high mag shooting so decided to do a quick and dirty comparison of the 2 at 3:1. Using my 350D/sigma 105 with a reversed 50mm pentax lens at F7.1 and a 40D/MPE-65. I'd normally shoot around F7.1 at 3:1 - I used to shoot F11 when using the old combo before.
The target was the queens eye on a £20 note. The whole thing done handheld resting the cameras on a table so I can't guarantee absolute reproduction of shooting angles.

My conclusion was that the sigma 105/50mm combo does not have as flat a field of focus (important for 2-D shooting but not so much for 3-D subjects) as the MPE-65 (shooting angle might be different as well), but where both images are in sharp focus the resolution seems very comparable. One area I do think is different is the handling of OOF areas where the bokeh of the MPE-65 seems better. The focus distance of the 105/reversed 50mm was also a lot closer than the MPE-65.

Does show though that as others have demonstrated you can get excellent images with a reversed (old) 50mm lens and it's raining outside at the moment :) .

Brian V.

#1 350D/sigma 105/reversed 50mm pentax lens F7.1

IMAGE: http://farm4.static.flickr.com/3063/2368634176_c9c4159a9b_o.jpg

#2 40D/MPE-65 F7.1

IMAGE: http://farm3.static.flickr.com/2037/2368634182_4d176e7074_o.jpg

#3 100% crop of #1

IMAGE: http://farm3.static.flickr.com/2172/2368634184_da6b9cb263_o.jpg

#4 100% crop of #2

IMAGE: http://farm4.static.flickr.com/3052/2368634186_7720e3ec02_o.jpg

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roman_t
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Mar 28, 2008 06:40 |  #2

reversed setup looks good but 65mm worth its cost.




  
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DaveBinks
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Mar 28, 2008 07:45 |  #3

Interesting photos - what type of adaptor did you use to reverse the 50 onto the Sigma - I've got a 50 that I'd like to do the same with?


Dave B

  
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LordV
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Mar 28, 2008 08:28 |  #4

Thanks for the comments :)
Dave - I just made a cylinder out of foam camping mat which tightly grips the 50mm lens (having preset it wide open and focused on infinity) and slide it on to the barrel of the macro lens - the tube was just stuck together with duct tape. You can of course use proper reversing adapters which have male/male filter threads to fit the filter thread diameters of your lenses (you may need a step or step down ring if you can't find the right adapter).

Brian V.


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Action_Man
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Mar 28, 2008 09:39 as a reply to  @ LordV's post |  #5

Thanks for the tests Brian, what i would like to know is regarding the apertures of both lenses, how do you set those ?. i havent tried macro with two lenses before, i only have short focus prime lenses,from 50mm to 24mm, i dont suppose they would work very well together, would they ? ...


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LordV
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Mar 28, 2008 09:51 |  #6

Action_Man wrote in post #5209222 (external link)
Thanks for the tests Brian, what i would like to know is regarding the apertures of both lenses, how do you set those ?. i havent tried macro with two lenses before, i only have short focus prime lenses,from 50mm to 24mm, i dont suppose they would work very well together, would they ? ...

To reverse a lens onto another ideally you need a longer lens and a shorter focal length lens. For non macro lenses the Mag = focal length of camera lens/focal length of reversed lens. For a macro lens as the main longer lens then mag = as previous calc +1.

The aperture is controlled by the lens attached to the camera- the reversed lens is used wide open and focused on infinity.

Brian V.


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Action_Man
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Mar 28, 2008 10:39 |  #7

Yes i`ve tried it with two 50mms lenses, and its not recommended, the dof and vignetting are terrible :) ...


Gordon
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Ballen ­ Photo
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Mar 28, 2008 10:55 |  #8

Thanks for this demonstration Brian, The capability of longer focus distance with the MPE-65 would make things easier IMO.
I've actually used the reverse lens idea when I was experimenting with macro, but if memory serves, was some what of a pita.
FWIW though, These two images compare favorably. :)
-Bruce


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newb2pro_1day_or_so
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Mar 28, 2008 11:15 as a reply to  @ Ballen Photo's post |  #9

I think the MPE has a little bit of an edge on sharpness in comparison, but I actually like #1 better. The lighting doesn't seem quite as flat and the harshness is a little worse in number #1, making it more interesting as the ink is shown to be elevated with the harsh lighting. Very nice comparison as I have the canon 100mm and I bought a step ring for 12 bucks for my 50mm reversed. I as well went to an old camera store to pick up a 28mm with the same filter thread diameter as my 50mm to get a higher magnification...but that has RAZOR thin dof it's almost undesirable. Very nice comparison!


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LordV
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Mar 29, 2008 02:17 |  #10

Thanks for looking and commenting everybody :)
Dan whatever way you get high magnification you will get very thin DOF - comes with the territory.
Brian V.


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Dalantech
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Mar 29, 2008 02:29 |  #11

Cool comparison Brian. What I'd like to see is a comparison of the two at F11 to see which combination focuses better at that aperture. The images that I've been taking at F11 between 3 to 5x have been pretty sharp with the MPE-65.


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lance ­ v
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Mar 29, 2008 05:36 as a reply to  @ Dalantech's post |  #12

now u just have to reverse a MP-E:rolleyes:


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Dalantech
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Mar 29, 2008 09:10 |  #13

lance v wrote in post #5215925 (external link)
now u just have to reverse a MP-E:rolleyes:

Actually I think that the MPE-65 is a reversed lens...


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lance ­ v
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Mar 29, 2008 17:39 |  #14

Dalantech wrote in post #5216584 (external link)
Actually I think that the MPE-65 is a reversed lens...

O....well thats no fun then lol


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macro ­ junkie
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Mar 29, 2008 18:49 |  #15

lance v wrote in post #5219202 (external link)
O....well thats no fun then lol

u bought them diffusers yet u cheape skate :lol:


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MPE-65 vs reversed 50mm
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