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caspert79
Joined: 31 Oct 2010
Posts: 2928
Location: The Netherlands
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 Posted: Fri Jun 19, 2020 12:26 pm Post subject: Auto-Yashinon 5cm f/2 (Tomioka) vs SMC Pentax 50mm f/1.4 |
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caspert79 wrote:
A little test between these two great lenses.
First, the overview picture:
100% center:
The Pentax is suffering @f/1.4. From f/2 upwards, both lenses show plenty of detail. The SMC Pentax, being a multicoated lens, has more saturated colors.
100% corner:
Better performance from the Yashinon at f/2. Then, from f/2.8 and smaller, something funny happens: the Yashinon retains more detail in the very extreme corners, but the Pentax is better slightly inwards.
Bokeh with 100% detail:
Plenty of detail from both lenses. I personally find the bokeh of the Pentax a bit too wild @f/1.4. From f/2 and smaller, the bokeh is quite pleasant and neutral. The Yashinon shows a slightly swirly bokeh. It's a matter of taste what you like more. I personally think, the images from the Yashinon look more 3D than the Pentax; what do you think? |
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pdccameras
Joined: 23 Aug 2009
Posts: 826
Location: Putnam, CT
Expire: 2014-08-11
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| Posted: Fri Jun 19, 2020 1:57 pm Post subject: |
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pdccameras wrote:
Nice comparison! Thank you for posting.
Both of these lenses are nice performers. I personally would give the Pentax the overall edge due to the warmer and more saturated color, and its extra speed, but that is personal preference. Certainly the color balance is easily manipulated in post if you are shooting digital. I would give corner performance to the Yashica, but an overall image at normal magnification would probably show almost no difference between samples. I think in those photos the Yashica seems a little more contrasty. Perhaps that could also be attributed to a change in the lighting when the photo was taken.
All the best,
Paul
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Canon 5D Mii, Canon 40D, Canon 350D IR, Sony A7 Mii, Sony Alpha-6000, a ton of lenses: AF & MF and too many cameras to count, all formats: 110 - 4x5. |
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visualopsins
Joined: 05 Mar 2009
Posts: 10543
Location: California
Expire: 2025-04-11
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| Posted: Fri Jun 19, 2020 3:20 pm Post subject: |
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visualopsins wrote:
 clever method for comparing center & corner, tilting the horizon! Bravo.
I agree the Auto-Yashinon looks to have more 3D. I'm not so sure about how color balance can make the Yashinon look more like the SMC. The coatings allow more light transmission. I think lens formula (CA correction) has much more effect on color balance.
To be clear, what is written on the name ring of the "SMC Pentax 50mm f/1.4" lens, and what is the mount?
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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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caspert79
Joined: 31 Oct 2010
Posts: 2928
Location: The Netherlands
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| Posted: Fri Jun 19, 2020 3:35 pm Post subject: |
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caspert79 wrote:
| visualopsins wrote: |
clever method for comparing center & corner, tilting the horizon! Bravo.
I agree the Auto-Yashinon looks to have more 3D. I'm not so sure about how color balance can make the Yashinon look more like the SMC. The coatings allow more light transmission. I think lens formula (CA correction) has much more effect on color balance.
To be clear, what is written on the name ring of the "SMC Pentax 50mm f/1.4" lens, and what is the mount? |
It's excactly that. The first bayonet version, the 'K' version. Optically identical to the SMC Tak. |
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Teemō
Joined: 07 Apr 2016
Posts: 586
Location: Australia
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| Posted: Sat Jun 20, 2020 4:57 pm Post subject: |
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Teemō wrote:
| visualopsins wrote: |
clever method for comparing center & corner, tilting the horizon! Bravo.
I'm not so sure about how color balance can make the Yashinon look more like the SMC. The coatings allow more light transmission. |
What is more light transmission if not colour?  Thankfully most lenses produce reasonable colour from the outset, but there are some absolutely awful vintage binoculars out there, sometimes your eyes cannot adjust. The worst coatings are the gold/mirror type, where most of the red light is reflected, which served as a false CA correction and looked attractive to buyers. Minolta designed their 'Achromatic' coating to colour balance all their lenses. |
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tachi
Joined: 09 May 2020
Posts: 97
Location: China guangzhou
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| Posted: Sun Jun 21, 2020 3:30 am Post subject: |
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tachi wrote:
Thank you for sharing the information。
I prefer yashinon，Its bokeh is more detailed
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caspert79
Joined: 31 Oct 2010
Posts: 2928
Location: The Netherlands
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| Posted: Sun Jun 21, 2020 4:47 am Post subject: |
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caspert79 wrote:
| tachi wrote: |
Thank you for sharing the information。
I prefer yashinon，Its bokeh is more detailed |
The Yashinon has its own character, it doesn't really show in this 'splitting hairs test’. Which makes you question the purpose of splitting hairs in the first place. Still, I like to do it, out of curiosity. |
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