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Sciolist
Joined: 29 Mar 2017
Posts: 1445
Location: Scotland
Expire: 2021-04-16
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 Posted: Sat Apr 11, 2020 3:46 pm Post subject: Ultrafast Lenses – Legends, budget options, modding, tests |
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Sciolist wrote:
I might be the last to discover this bunch, but I thought I'd share.
Production values are high and it hits the requisites of 'inform, educate and entertain'. A worthy 50 minutes during this lock-down.
At 28:50, they go into membership costs if you want to support. There seems to be quite a lot of freebies for what they are asking. I have no connection with them.
I hope you enjoy.
https://www.youtube.com/watch?v=2p5E7iXxeQE |
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aidaho
Joined: 29 Apr 2018
Posts: 456
Location: Ukraine
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| Posted: Sat Apr 11, 2020 4:09 pm Post subject: |
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aidaho wrote:
Very comprehensive dive into the subject indeed.
I do have an option to jerry rig something like T1.1 for APS-C if I really wanted to, by combining FDn 50/1.2 and Lens Turbo II FD-NEX.
The only reason I have not is: it makes more sense to just use said 50/1.2 on FF body.
By far the cheapest option in getting as close as possible to T1 on FF is used Mitakon 50/0.95.
The weight, while decent for what it is, is far and beyond the definition of "walkaround" or "travel" lens.
50/1.2, doing some 1.2 things.
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https://www.flickr.com/photos/curry-hexagon/ |
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Sciolist
Joined: 29 Mar 2017
Posts: 1445
Location: Scotland
Expire: 2021-04-16
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| Posted: Sat Apr 11, 2020 5:15 pm Post subject: |
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Sciolist wrote:
^^ That's a lovely shot aidaho. It looks like a still from a 1940s film noir. |
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aidaho
Joined: 29 Apr 2018
Posts: 456
Location: Ukraine
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| Posted: Sat Apr 11, 2020 9:48 pm Post subject: |
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aidaho wrote:
| Sciolist wrote: |
| ^^ That's a lovely shot aidaho. It looks like a still from a 1940s film noir. |
Thanks.
Related topic on 50mm low light performance: http://forum.mflenses.com/nifty-fifty-low-light-performance-t81184.html
In terms of lens characteristics like size, weight and IQ, one has to start taking increasingly noticeable penalties after we cross T2 for FF. And once below T1.4, on the way to theoretical maximum, the law of diminishing returns is outright brutal.
The F0.7 lens in video above demonstrates this very well.
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https://www.flickr.com/photos/curry-hexagon/ |
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Sciolist
Joined: 29 Mar 2017
Posts: 1445
Location: Scotland
Expire: 2021-04-16
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| Posted: Sun Apr 12, 2020 10:32 am Post subject: |
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Sciolist wrote:
| aidaho wrote: |
In terms of lens characteristics like size, weight and IQ, one has to start taking increasingly noticeable penalties after we cross T2 for FF. And once below T1.4, on the way to theoretical maximum, the law of diminishing returns is outright brutal.
The F0.7 lens in video above demonstrates this very well. |
I wonder how the American Optical made, Solid Schmidt, mentioned in the vid, performed at f:0.384  .
https://archive.org/stream/USAF_lens_datasheets/01-Section-1#page/n24/mode/1up |
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cooltouch
Joined: 15 Jan 2009
Posts: 9097
Location: Houston, Texas
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| Posted: Tue Apr 14, 2020 6:19 pm Post subject: |
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cooltouch wrote:
Wow, looking at the specs on that lens: 3.259" (83mm) focal length, but the objective diameter is over 14" -- that's over 355mm. For an 83mm focal length lens! Not exactly hand-holdable, I suspect.
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Michael
My Gear List: http://michaelmcbroom.com/photo/gear.html
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visualopsins
Joined: 05 Mar 2009
Posts: 10541
Location: California
Expire: 2025-04-11
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| Posted: Wed Apr 15, 2020 1:44 am Post subject: |
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visualopsins wrote:
And finding subjects and nailing focus wide open lol
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Cameras: Sony ILCE-7RM2, Spotmatics II, F, and ESII, Nikon P4
Lenses:
M42 Asahi Optical Co., Takumar 1:4 f=35mm, 1:2 f=58mm (Sonnar), 1:2.4 f=58mm (Heliar), 1:2.2 f=55mm (Gaussian), 1:2.8 f=105mm (Model I), 1:2.8/105 (Model II), 1:5.6/200, Tele-Takumar 1:5.6/200, 1:6.3/300, Macro-Takumar 1:4/50, Auto-Takumar 1:2.3 f=35, 1:1.8 f=55mm, 1:2.2 f=55mm, Super-TAKUMAR 1:3.5/28 (fat), 1:2/35 (Fat), 1:1.4/50 (8-element), Super-Multi-Coated Fisheye-TAKUMAR 1:4/17, Super-Multi-Coated TAKUMAR 1:4.5/20, 1:3.5/24, 1:3.5/28, 1:2/35, 1:3.5/35, 1:1.8/85, 1:1.9/85 1:2.8/105, 1:3.5/135, 1:2.5/135 (II), 1:4/150, 1:4/200, 1:4/300, 1:4.5/500, Super-Multi-Coated Macro-TAKUMAR 1:4/50, 1:4/100, Super-Multi-Coated Bellows-TAKUMAR 1:4/100, SMC TAKUMAR 1:1.4/50, 1:1.8/55
M42 Carl Zeiss Jena Flektogon 2.4/35
Contax Carl Zeiss Vario-Sonnar T* 28-70mm F3.5-4.5
Pentax K-mount SMC PENTAX ZOOM 1:3.5 35~105mm, SMC PENTAX ZOOM 1:4 45~125mm
Nikon Micro-NIKKOR-P-C Auto 1:3.5 f=55mm, NIKKOR-P Auto 105mm f/2.5 Pre-AI (Sonnar), Micro-NIKKOR 105mm 1:4 AI, NIKKOR AI-S 35-135mm f/3,5-4,5
Tamron SP 17mm f/3.5 (51B), Tamron SP 17mm f/3.5 (51BB), SP 500mm f/8 (55BB), SP 70-210mm f/3.5 (19AH)
Vivitar 100mm 1:2.8 MC 1:1 Macro Telephoto (Kiron)
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wolfhansen
Joined: 06 Oct 2013
Posts: 511
Location: Germany, Ruhr Area
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| Posted: Tue Apr 21, 2020 4:13 am Post subject: |
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wolfhansen wrote:
#1
I like the M-Mount 7artisans 1.1/50mm for nightshots. Decent size and weight on my A7II.
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Greets
Wolfgang |
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