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iangreenhalgh1
Joined: 18 Mar 2011 Posts: 15685
Expire: 2014-01-07
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Posted: Wed May 18, 2022 12:43 pm Post subject: Ultracheap Ultrawide - DIY 9mm f2 on Olympus OM-D E-M5 |
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iangreenhalgh1 wrote:
I love ultrawide lenses but until now, haven't had anything all that wide to use on my M4/3 cameras - the 2x crop factor makes it difficult to find non-native lenses wide enough and native lenses like the Panasonic Leica f1.7 9mm and Olympus f2 12mm are outside my budget.
So I decided to apply a little ingenuity and cobbled together my own ultrawide solution using a repurposed projector lens, some extension tubes and a helicoid from a macro converter. It works rather well, although it has no iris.
Image quality for an f2 lens is exceptional, the usual problems of ultrawides such as barrel distortion and poor corners seem to be largely absent. I think I'm going to have a lot of fun and enjoyment exploring the capabilities of this frankenlens. Best of all, it cost me less than the price of two pints of beer to put together.
#1 - The bokeh is nice and smooth
#2 - Seems to be pretty sharp & contrasty to me
#3 - Interesting beams of light from the sun. The coatings seem to be pretty good at cutting down flare though.
#4 - The sun near the edge of the frame creates some beams but I think they are quite attractive and could be used to good effect
#5 - A brick wall shot to show the distortion and I can't actually discern any distortion, which is very pleasing
#6
#7 - Purple fringing is very subtle and should be easily removed in software.
#8 - Shiny thing in direct sunlight to check for the dreaded purple fringing - note that it must have been a rather large seagull....
#9 - Against the sun flare is pretty well controlled
#10 - Close up ability is pretty good, this was with the front glass of the lens almost touching the subject.
_________________ I don't care who designed it, who made it or what country it comes from - I just enjoy using it!
Last edited by iangreenhalgh1 on Wed May 18, 2022 6:23 pm; edited 1 time in total |
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eggplant
Joined: 27 May 2020 Posts: 516
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Posted: Wed May 18, 2022 12:47 pm Post subject: |
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eggplant wrote:
Very interesting - what was the projection lens used? Do you have any photos of the setup?
Sorry, I reread it- you basically used a projection lens in a helicoid.
Yes, I have some which are pretty amazingly sharp wide open with smooth bokeh. Later digital projection ones that is. I have not seen a 9mm one though... |
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iangreenhalgh1
Joined: 18 Mar 2011 Posts: 15685
Expire: 2014-01-07
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Posted: Wed May 18, 2022 1:09 pm Post subject: |
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iangreenhalgh1 wrote:
It's from an NEC NP610S Ultra Short Throw projetor:
https://www.projectorcentral.com/NEC-NP610S.htm
I'll take a pic of how it looks later. _________________ I don't care who designed it, who made it or what country it comes from - I just enjoy using it! |
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eggplant
Joined: 27 May 2020 Posts: 516
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Posted: Wed May 18, 2022 1:54 pm Post subject: |
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eggplant wrote:
Surprising- that's a lens for a 3 chip projector bei g used on 1 chip camera and the level of CA isn't terrible.
I haven't used lenses like that enough though, but I'm impressed nonetheless. |
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lumens pixel
Joined: 27 Feb 2019 Posts: 834
Expire: 2021-06-25
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Posted: Wed May 18, 2022 2:22 pm Post subject: |
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lumens pixel wrote:
_________________ Lumens Pixel
-------------
Minolta SR mount: 16 2,8; Sigma SuperWide 24 2,8; 28 2,5; 28 2,8; 28 3,5; 35 2,8; 45 2,0; 50 1,4; 50 1,7; 50 2,0; 58 1,4; 85 2,0; 100 2,5; 100 4 Macro; 135 3,5; 135 2,8; 200 4; RF 250 5,6; 24-35 3,5; 35-70 3,5; 75-150 4; 70-210 4
Canon FD mount: Tokina RMC 17 3,5; 28 2,8; 35 2,8; 50 1,8; 50 3,5 Macro; 55 1,2; 135 3,5; 135 2,5; 200 4,0; 300 5,6; 28-55 3,5 4,5; Tokina SZ-X SD 270; 70-150 4,5; 70-210 f4; 80-200 4L; Tokina SZ-X 845
Tamron Adaptall: 28-80 3,5-4,2 (27A); 70-210 3,8-4 (46A); 60-300 (23A); 90 2,5 (52B); 35-135 3,5-4,5 (40A)
Tamron SP: 20-40 2,7-3,5 (266D) |
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iangreenhalgh1
Joined: 18 Mar 2011 Posts: 15685
Expire: 2014-01-07
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Posted: Wed May 18, 2022 9:20 pm Post subject: |
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iangreenhalgh1 wrote:
Although the light was pretty bad and it was trying to rain, I took the diy ultrawide out for some more fun. It really is a fun lens to play with and produces lovely results.
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#8
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#11
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#13
#14
_________________ I don't care who designed it, who made it or what country it comes from - I just enjoy using it! |
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Himself
Joined: 01 Mar 2007 Posts: 3216 Location: Montreal
Expire: 2013-05-30
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Posted: Thu May 19, 2022 12:26 am Post subject: |
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Himself wrote:
Not bad at all!! _________________ Moderator Himself |
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iangreenhalgh1
Joined: 18 Mar 2011 Posts: 15685
Expire: 2014-01-07
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Posted: Thu May 19, 2022 1:00 am Post subject: |
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iangreenhalgh1 wrote:
Just a shame it doesn't have an iris, but I could always fit one at some point. _________________ I don't care who designed it, who made it or what country it comes from - I just enjoy using it! |
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RokkorDoctor
Joined: 27 Nov 2021 Posts: 1276 Location: Kent, UK
Expire: 2025-05-01
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Posted: Thu May 19, 2022 9:29 am Post subject: |
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RokkorDoctor wrote:
Not bad for something that cost less than two pints of beer!!
If you do find a way to get an aperture added (at an appropriate position), results will likely be even better. _________________ Mark
SONY A7S, A7RII + dust-sealed modded Novoflex/Fotodiox/Rayqual MD-NEX adapters
Minolta SR-1, SRT-101/303, XD7/XD11, XGM, X700
Bronica SQAi
Ricoh GX100
Minolta majority of all Rokkor SR/AR/MC/MD models made
Sigma 14mm/3.5 for SR mount
Tamron SP 60B 300mm/2.8 (Adaptall)
Samyang T-S 24mm/3.5 (Nikon mount, DIY converted to SR mount)
Schneider-Kreuznach PC-Super-Angulon 28mm/2.8 (SR mount)
Bronica PS 35/40/50/65/80/110/135/150/180/200/250mm |
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iangreenhalgh1
Joined: 18 Mar 2011 Posts: 15685
Expire: 2014-01-07
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Posted: Thu Jun 16, 2022 12:13 am Post subject: |
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iangreenhalgh1 wrote:
I've given up on trying to fit an aperture to this thing as it would require severe surgery and the chances are, it'll go wrong...
But even as it is, this lens works really well, especially for architectural subjects.
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_________________ I don't care who designed it, who made it or what country it comes from - I just enjoy using it! |
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kds315*
Joined: 12 Mar 2008 Posts: 16552 Location: Weinheim, Germany
Expire: 2021-03-09
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Posted: Sun Jun 19, 2022 3:12 pm Post subject: |
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kds315* wrote:
ONLY 28 pictures, how could we even guess how good it is?
Excitement got you carried away, we understand that
Not shabby indeed... _________________ Klaus - Admin
"S'il vient a point, me souviendra" [Thomas Bohier (1460-1523)]
http://www.macrolenses.de for macro and special lens info
http://www.pbase.com/kds315/uv_photos for UV Images and lens/filter info
https://www.flickr.com/photos/kds315/albums my albums using various lenses
http://photographyoftheinvisibleworld.blogspot.com/ my UV BLOG
http://www.travelmeetsfood.com/blog Food + Travel BLOG
https://galeriafotografia.com Architecture + Drone photography
Currently most FAV lens(es):
X80QF f3.2/80mm
Hypergon f11/26mm
ELCAN UV f5.6/52mm
Zeiss UV-Planar f4/60mm
Zeiss UV-Planar f2/62mm
Lomo Уфар-12 f2.5/41mm
Lomo Зуфар-2 f4.0/350mm
Lomo ZIKAR-1A f1.2/100mm
Nikon UV Nikkor f4.5/105mm
Zeiss UV-Sonnar f4.3/105mm
CERCO UV-VIS-NIR f1.8/45mm
CERCO UV-VIS-NIR f4.1/94mm
CERCO UV-VIS-NIR f2.8/100mm
Steinheil Quarzobjektiv f1.8/50mm
Pentax Quartz Takumar f3.5/85mm
Carl Zeiss Jena UV-Objektiv f4/60mm
NYE OPTICAL Lyman-Alpha II f1.1/90mm
NYE OPTICAL Lyman-Alpha I f2.8/200mm
COASTAL OPTICS f4/60mm UV-VIS-IR Apo
COASTAL OPTICS f4.5/105mm UV-Micro-Apo
Pentax Ultra-Achromatic Takumar f4.5/85mm
Pentax Ultra-Achromatic Takumar f5.6/300mm
Rodenstock UV-Rodagon f5.6/60mm + 105mm + 150mm
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iangreenhalgh1
Joined: 18 Mar 2011 Posts: 15685
Expire: 2014-01-07
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Posted: Sun Jun 19, 2022 4:27 pm Post subject: |
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iangreenhalgh1 wrote:
Whoops, I didn't realise it was 28. I just uploaded all the pictures I had taken with it that I liked over the last month or so, without counting how many it was. _________________ I don't care who designed it, who made it or what country it comes from - I just enjoy using it! |
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