| View previous topic :: View next topic |
| Author |
Message |
NikonUser
Joined: 04 Sep 2008
Posts: 2558
Location: southern New Brunswick, Canada
|
 Posted: Sun Nov 22, 2009 7:22 pm Post subject: |
 |
|
The 50mm f2.8 Bronica Zenzanon-E reversed on bellows for 2.36-5.76x magnification with good working distance
HERE
The old 28/3.5 Nikkor wide angle, reversed on bellows ; great at 4.3x magnification
HERE
_________________
NU.
student of entomology
Quote – Holmes on ‘Entomology’
” I suppose you are an entomologist ? “
” Not quite so ambitious as that, sir. I should like to put my eyes on the individual entitled to that name.
No man can be truly called an entomologist,
sir; the subject is too vast for any single human intelligence to grasp.”
Oliver Wendell Holmes, Sr
The Poet at the Breakfast Table.
Nikon camera, lenses and objectives
Olympus microscope and objectives |
|
| Back to top |
|
 |
NikonUser
Joined: 04 Sep 2008
Posts: 2558
Location: southern New Brunswick, Canada
|
| Posted: Sat Aug 28, 2010 9:16 am Post subject: |
|
|
Photos of Nikon CF Plan 2x, and CF N Plan 4x, 10x, 40x
and
Nikon CF M Plan 5x, 10x. 20x ELWD, 40x ELWD
ON THIS PAGE
_________________
NU.
student of entomology
Quote – Holmes on ‘Entomology’
” I suppose you are an entomologist ? “
” Not quite so ambitious as that, sir. I should like to put my eyes on the individual entitled to that name.
No man can be truly called an entomologist,
sir; the subject is too vast for any single human intelligence to grasp.”
Oliver Wendell Holmes, Sr
The Poet at the Breakfast Table.
Nikon camera, lenses and objectives
Olympus microscope and objectives |
|
| Back to top |
|
|
rjlittlefield
Site Admin
Joined: 01 Aug 2006
Posts: 19710
Location: Richland, Washington State, USA
|
| Posted: Tue Feb 08, 2011 12:33 pm Post subject: |
|
|
Here is a related question that comes up occasionally.
| Quote: | | I hear a lot about "enlarging lenses". What exactly are those things and what makes them better than say reversing normal lenses? |
Enlarging lenses are short-barrel lenses with manual apertures and simple screw mounts, optically corrected to work best at short distances by themselves with no other optics needed.
They were originally designed to be used for making large prints from small film, hence "enlarging". A good example is the 50 mm f/2.8 EL Nikkor lens. This was excellent for printing 35 mm film (36 mm x 24 mm format) to sizes ranging from 6 inch x 4 inch snapshots up to say 24 inch x 16 inch large prints. For this use, it was important that the lens have flat field and deliver good sharpness corner to corner at magnifications in the range of 4-16X (film to print).
When this lens is reversed and used for macro photography over a small field, it probably out-resolves most crop-factor sensors at 2X and remains quite good even up to 5X. Beyond there, its aperture is too small to compete with microscope objectives and specialized high resolution macro lenses that are optimized to deliver higher resolution over a smaller field.
Compared to a lens "combo" (short lens reversed in front of long lens), it's impossible to say without testing whether a reversed enlarger lens will give higher quality. Some combos have excellent resolution and lack of chromatic aberration; some don't.
The main advantage of a good enlarging lens reversed on bellows is flexibility combined with high quality and low cost. The set in front of me right now gives field width from 18 mm down to 5 mm (using a 23 mm sensor). This is not as convenient nor quite as wide a range as the specialized Canon MP-E 65 (1X-5X), but on the other hand it's about 10X cheaper.
--Rik |
|
| Back to top |
|
|
SONYNUT
Joined: 22 Jan 2011
Posts: 635
Location: Minnesota USA
|
| Posted: Tue Feb 08, 2011 3:36 pm Post subject: |
|
|
the best I have for the price (15 bucks) so far is a good old el-nikkor 50 4.
an old film container snaps right in the front as a shade,,just slice the bottom off..
mounted on a sony a55 with minolta bellows
unretouched stacked pics
_________________
..............................................................................
Just shoot it......
Last edited by SONYNUT on Tue Feb 08, 2011 11:20 pm; edited 3 times in total |
|
| Back to top |
|
|
lauriek
Site Admin
Joined: 25 Nov 2007
Posts: 2404
Location: South East UK
|
|
| Back to top |
|
|
Harold Gough
Joined: 09 Mar 2008
Posts: 5787
Location: Reading, Berkshire, England
|
| Posted: Wed Feb 09, 2011 12:55 am Post subject: |
|
|
I would like to thank those who have contributed to this FAQ.
A few years ago I was very impressed by published images taken via a Taylor Hobson 12.5mm f2.7 but I have yet to be able to track one down.
Harold
_________________
My images are a medium for sharing some of my experiences: they are not me. |
|
| Back to top |
|
|
Harold Gough
Joined: 09 Mar 2008
Posts: 5787
Location: Reading, Berkshire, England
|
| Posted: Wed Feb 09, 2011 1:29 am Post subject: |
|
|
Find some data here:
http://www.macrolenses.de/
Harold
_________________
My images are a medium for sharing some of my experiences: they are not me. |
|
| Back to top |
|
|
|
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
