Rev lens Magnification Comparison
/forum/topic/619903/0



Tom Hicks
Registered: Feb 16, 2003
Total Posts: 23155
Country: United States

Took some time today to run a comparison between some lens , I started out thinking I would try to find the lens that might be very soft in the corners , but for the most part they all are . Thinking about this further I have come to the conclusion that for bug and flower stuff it doesn't really matter as DOF in the corners for the most part is non existent. What I did find is a great variance in the mag rates for the different lens , specially the wide variance in the 50mm lens . All shots on tripod , trying hard to keep everything on the same plane, all lens set at f 8 and focus set at infinity . All focus done manually ( yes my eyes got tired. ) You can come to your own conclusion.

Hope this helps some, it was a lot of work .



Edited by Tom Hicks on Feb 26, 2008 at 04:59 PM GMT



Tom Hicks
Registered: Feb 16, 2003
Total Posts: 23155
Country: United States

#2



Edited by Tom Hicks on Feb 26, 2008 at 04:59 PM GMT



Tom Hicks
Registered: Feb 16, 2003
Total Posts: 23155
Country: United States

#3




Tom Hicks
Registered: Feb 16, 2003
Total Posts: 23155
Country: United States

#4



Tom Harpstead
Registered: Jul 08, 2007
Total Posts: 943
Country: United States

Tom,

Very interesting, not all lenses are equal when reversed. Who would have thunk it. Thank you for all the eye straining work.

One more question, was your test, reversed on lens or directly to a body?

I will now also have to look at my 50s.

Thomas



Tom Hicks
Registered: Feb 16, 2003
Total Posts: 23155
Country: United States

All the lens were rev. direct to the camera



Justin Huffman
Registered: Aug 25, 2004
Total Posts: 5469
Country: United States

thanks for this Tom. I have been considering a nice little 28mm for reversing, as it gets so much closer and is alot wider than my nifty fifty.
thanks again!

justin



Nick Klofkorn
Registered: Oct 04, 2006
Total Posts: 822
Country: United States

wow I cannot even imagine what a hassle this would have been, good job Tom



LordV
Registered: Jan 02, 2006
Total Posts: 28246
Country: United Kingdom

Good comparison Tom- suprised at the different mags from the 50mm lens series- were they all at the same focus setting on the lens (ie either min or max) ?

Brian V.



Tom Hicks
Registered: Feb 16, 2003
Total Posts: 23155
Country: United States

LordV wrote:
Good comparison Tom- suprised at the different mags from the 50mm lens series- were they all at the same focus setting on the lens (ie either min or max) ?

Brian V.


Yes everything was set at infinity. It did produce some surprises .



Eric Gottesman
Registered: Jan 02, 2008
Total Posts: 568
Country: United States

Could you show how you mount the lens to the body reversed? I've seen lens to lens, but not lens to body. Is this a regularly available adapter to the filter? I have a 18-250mm that I held to the body at 250mm and the mag was huge! What would 250mm reversed produce (what's the calc.)? I have a 60mm macro for quality work (nice lens), but the 250mm was fun to play with. I'd love to have a more secure mount than my hands;-)

Thanks for all the hard work!
Eric



Tom Hicks
Registered: Feb 16, 2003
Total Posts: 23155
Country: United States

Eric Gottesman wrote:
Could you show how you mount the lens to the body reversed? I've seen lens to lens, but not lens to body. Is this a regularly available adapter to the filter? I have a 18-250mm that I held to the body at 250mm and the mag was huge! What would 250mm reversed produce (what's the calc.)? I have a 60mm macro for quality work (nice lens), but the 250mm was fun to play with. I'd love to have a more secure mount than my hands;-)

Thanks for all the hard work!
Eric


Follow this link, the one for my canon I made .

http://www.srb-griturn.com/canon-eos-reversing-rings-73-p.asp

http://www.fredmiranda.com/hosting/showgallery.php?cat=500&name=Tom+Hicks



nanana
Registered: Nov 26, 2005
Total Posts: 1581
Country: United States

Wow, impressed.

Tom, could you give me the info of the ring or adapter you used for Nikon as shown above in the picture?
I am very much interested in trying this out...man, impressive...
Thanks in advance,
Abe



Dalantech
Registered: Jan 31, 2005
Total Posts: 12824
Country: Italy

Wow! Thanks Tom! I've been thinkin' of doing some rev work myself just for the experience.