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Nisi announce new 15mm lens
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Wētāpunga View Drop Down
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Posts: 5606 		Post Options Post Options   Quote Wētāpunga Quote  Post ReplyReply Direct Link To This Post Topic: Nisi announce new 15mm lens
    Posted: 08 January 2021 at 03:28
Just got notified that NiSi is releasing a 15mm f/4 Sunstar Super Wide Angle Full Frame ASPH Lens for Canon RF, Sony E, Nikon Z and Fujifilm X mounts is now available.

Weighs in at 470g and has a 72mm filter. Manual focus only. Can't tell if it has electric contacts like Voigtlander or none like Laowa.
a77ii- Sony 135/2.8 STF, 16-50/2.8, 70-200/2.8 G
a7riii- Voigtländer 15/4.5, Zeiss Loxia 21/2.8, 35/2, 50/2, 85/2.4, Batis 85/1.8, Voigtländer 110/2.5, Sony 24-105/4 G, Sigma 100-400 f5-6.3.
 



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dCap View Drop Down
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Posts: 6124 		Post Options Post Options   Quote dCap Quote  Post ReplyReply Direct Link To This Post Posted: 08 January 2021 at 12:44
MTF charts look nice

10-blade (or any 'even' number) are apparently part of the key to the better/nicer sunstars?

Some Voigtländers have 10 or even 12 blades.

While the AF people aim for 7 or 9. An odd number will produce 14 or 18 point stars which can overlap/merge. While the 10 or 12 blade will make 10 or 12 pointed stars with more gaps in the angles.
Walk out if it doesn't feel right
I can tell you're only lying
If you've got something better tonight
Then don't mess up my mind with your crying
Just Walk Out In The Rain
Eric Clapton, 1978
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Miranda F View Drop Down
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Posts: 3814 		Post Options Post Options   Quote Miranda F Quote  Post ReplyReply Direct Link To This Post Posted: 08 January 2021 at 17:46
The key to sunstars is that the inner edge of the iris blades has to be dead straight. Older Sigmas have this*, but most Sony and Minolta ones have a curved edge right to the end which gives broad brush ends instead of nice spikes.
I've noticed that modern lenses often have curved blades wide open to give good bokeh and straight ends to give good sunstars at f11, which is very neat.
Easy to check which - just look at the on-line review images. Reviewers love sunstars!

IME the best sunstars coem form really cheap old nasty sigmas lenses.
Miranda F & Sensorex, Sony A7Rii, A58, Nex-6, Dynax 4, 5, 60, 500si/600si/700si/800si, various Sony & Minolta lenses, several Tamrons, lots of MF primes and *far* too many old film cameras ...
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nandbytes View Drop Down
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Posts: 3122 		Post Options Post Options   Quote nandbytes Quote  Post ReplyReply Direct Link To This Post Posted: 08 January 2021 at 19:49
Seems a bit big for a 15mm f4

Laowa 15mm f2
66mm x 82mm x 500g (72mm filter thread)

Nisi 15mm f4
75.6mm × 80.5mm x 470g (72mm filter thread)

Voigtlander 15mm f4.5
67.5 x 66.4mm x 294g (58mm filter thread)

laowa 14mm f4
58mm x 59mm x 228g (52mm filter thread)
my flickr
A7RIV, A7C
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Wētāpunga View Drop Down
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Posts: 5606 		Post Options Post Options   Quote Wētāpunga Quote  Post ReplyReply Direct Link To This Post Posted: 08 January 2021 at 21:54
Originally posted by nandbytes nandbytes wrote:

Seems a bit big for a 15mm f4

...

I'd noticed that too, having a Voigtlander 15mm already in the bag.
And my Voigtlanders and Loxias all have straight, even numbered aperture blades so in principle, I'm set for sunstars .
a77ii- Sony 135/2.8 STF, 16-50/2.8, 70-200/2.8 G
a7riii- Voigtländer 15/4.5, Zeiss Loxia 21/2.8, 35/2, 50/2, 85/2.4, Batis 85/1.8, Voigtländer 110/2.5, Sony 24-105/4 G, Sigma 100-400 f5-6.3.
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Wētāpunga View Drop Down
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Posts: 5606 		Post Options Post Options   Quote Wētāpunga Quote  Post ReplyReply Direct Link To This Post Posted: 09 January 2021 at 05:01
Review at Philip Reeve Blog now.

It doesn’t have electronic contacts. Comparisons to similar 14mm and 15mm lens options provided.
a77ii- Sony 135/2.8 STF, 16-50/2.8, 70-200/2.8 G
a7riii- Voigtländer 15/4.5, Zeiss Loxia 21/2.8, 35/2, 50/2, 85/2.4, Batis 85/1.8, Voigtländer 110/2.5, Sony 24-105/4 G, Sigma 100-400 f5-6.3.
 



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