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tb_a
Joined: 26 Jan 2010
Posts: 3678
Location: Austria
Expire: 2019-08-28
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 Posted: Tue May 05, 2020 9:30 am Post subject: Ultrawides on APS-C |
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tb_a wrote:
I've recently acquired a new Pentax lens (second hand at a bargain price) and wanted to find out how it compares with my existing lenses in this class and I'm happy to share my findings with you.
This comparison includes 3 lenses with a typical FOV of 22 to 24 mm on FF, IMHO a very useful angle of view for landscape photography on APS-C cameras.
The Pentax and the Sony lenses are APS-C lenses and the Voigtländer RF lens is designed for FF. The Pentax lens can be adapted on any mirrorless camera as long as the adapter is able to control the aperture; i.e. there is no aperture ring on the lens (on Pentax cameras it works with AF). The Sony lens is IMHO only usable on Sony cameras.
Here are the pictures all shot at F4 (at F4.5 with the Voigtländer lens) and converted and downsized in Lightroom. Camera was my A7R II in APS-C/18MP mode.
Voigtländer Super Wide-Heliar 15mm /F4.5 Aspherical in LTM:
HD Pentax-DA 15mm/F4 ED AL Limited
Sony E 16mm/F2.8 (SEL16F28)
Conclusion:
By far the best performance, i.e. really sharp from edge to edge is only the Pentax lens. Even the Sony smears in the corners still at F4. The Voigtländer lens is worst.
Therefore a clear recommendation for the Pentax lens which is also very solidly built, full metal and with integrated retractable metal hood.
_________________
Thomas Bernardy
Manual focus lenses mainly from Minolta, Pentax, Voigtlaender, Leitz, Topcon and from Russia (too many to be listed here). |
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SkedAddled
Joined: 19 Oct 2008
Posts: 1443
Location: Michigan, USA
Expire: 2021-08-12
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| Posted: Wed May 06, 2020 12:42 am Post subject: |
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SkedAddled wrote:
If you're exploring ultra-wide on APSC, you'd do well to look at the Sigma 10-20 or Canon 10-22.
Both are about as ultra-wide as you can get as far as true-image or non-fisheye rectilinear.
I own a Sigma 10-20, and it's fantastic with a Canon 50D.
Both can be had for good prices nowadays, reduced from
what they used to sell for.
After owning a 5D4 for a while, I was jonesing for an ultrawide lens, rectilinear.
I found it in a Rokinon 14mm ultrawide, which is not fisheye.
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Craig
Of course I'm all right! Why? What have you heard!?
Canon Digital EOS 5D Mk IV, EOS 50D, Powershot S3 iS
Vivitar 28 f/2.8 OM - Zuiko 50 f/1.8 OM - Tamron SP 28-80 f/3.5 AD2[Favorite!] - Hanimar 135 f/3.5 M42 - Soligor 135 f/2.8 T4 - Tamron SP 60-300 f/3.8 AD2 - Soligor 75-260 f/4.5 M42 - Soligor 400 f/6.3 T4 - Soligor 500 f/8 T2 Cat + Matched 2X TC - Addiction Growing!
This is us -- We drive these -- We're named these |
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visualopsins
Joined: 05 Mar 2009
Posts: 11046
Location: California
Expire: 2025-04-11
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| Posted: Wed May 06, 2020 3:31 am Post subject: |
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visualopsins wrote:
Starfield is always interesting.
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☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ like attracts like! ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮
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-A 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 (151B), 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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tb_a
Joined: 26 Jan 2010
Posts: 3678
Location: Austria
Expire: 2019-08-28
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| Posted: Wed May 06, 2020 6:51 am Post subject: |
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tb_a wrote:
| SkedAddled wrote: |
If you're exploring ultra-wide on APSC, you'd do well to look at the Sigma 10-20 or Canon 10-22.
Both are about as ultra-wide as you can get as far as true-image or non-fisheye rectilinear.
I own a Sigma 10-20, and it's fantastic with a Canon 50D.
Both can be had for good prices nowadays, reduced from
what they used to sell for.
After owning a 5D4 for a while, I was jonesing for an ultrawide lens, rectilinear.
I found it in a Rokinon 14mm ultrawide, which is not fisheye. |
Thanks, not really. I've just grabbed the Pentax lens for a bargain price and wanted to check it's performance. 
I have the CV 12mm/5.6 for FF use anyway and the shown CV 15/4.5 performs far better if stopped down, even on FF.
As you can see in the following example the CV 12/5.6 produces tack sharp pictures without corner smearing on the A7R II from edge to edge in FF as well:
_________________
Thomas Bernardy
Manual focus lenses mainly from Minolta, Pentax, Voigtlaender, Leitz, Topcon and from Russia (too many to be listed here). |
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