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Author Topic: ART lenses for L mount - why is the 40mm so huge?  (Read 1105 times)

hasselbladfan

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ART lenses for L mount - why is the 40mm so huge?
« on: April 04, 2019, 04:36:06 am »

Sigma just announced their (massive) line-up for the L mount. 11 lenses in one go! Leica and Hasselblad can barely deliver 1-2 lenses per year!

Does anybody has an idea why the 40mm 1.4 is so much heavier / larger than the 35mm / 50mm 1.4?

Is it so much better?

« Last Edit: April 04, 2019, 05:15:53 am by hasselbladfan »
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kers

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Re: ART lenses for L mount - why is the 40mm so huge?
« Reply #1 on: April 04, 2019, 07:20:30 am »

It appears to make good lenses it is easier to make them big than small...
Sigma makes large and heavy ones, Leica small and lightweight ones, but at a price
Yes i have the 40mm Sigma and it is a gem
If you need a lens that captures the images sharp corner to corner at f1.4 this is one that does.
see also:
https://www.lenstip.com/index.php?test=obiektywu&test_ob=548
and
https://diglloyd.com/blog/2019/20190109_1813-Sigma40f1_4A-aseries-LawsRailroadMuseum-Locomotive.html
+
https://www.lensrentals.com/blog/2019/03/mtf-results-for-recent-sigma-art-lenses/

« Last Edit: April 04, 2019, 10:39:10 am by kers »
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scooby70

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Re: ART lenses for L mount - why is the 40mm so huge?
« Reply #2 on: April 04, 2019, 08:27:50 am »

Sigma just announced their (massive) line-up for the L mount. 11 lenses in one go! Leica and Hasselblad can barely deliver 1-2 lenses per year!

Does anybody has an idea why the 40mm 1.4 is so much heavier / larger than the 35mm / 50mm 1.4?

Is it so much better?

But aren't the Sigma lenses existing lenses reworked for a different new mount? If they are that'll be why they're announced so many so quickly. I'd imagine that blank sheet designs take a lot longer than adapting an existing one to a new mount.
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Telecaster

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Re: ART lenses for L mount - why is the 40mm so huge?
« Reply #3 on: April 04, 2019, 04:25:00 pm »

The L mount Sigmas are SLR lenses adapted for mirrorless. But they're freakin' huge lenses on SLRs too! Sigma is going all out for high quality and speed using modern designs & manufacturing processes. This means lotsa lens elements, which means increased bulk and weight. Not my cuppa, but just the thing for some other folks.

-Dave-
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faberryman

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Re: ART lenses for L mount - why is the 40mm so huge?
« Reply #4 on: April 04, 2019, 04:44:28 pm »

The L mount Sigmas are SLR lenses adapted for mirrorless. But they're freakin' huge lenses on SLRs too!
Add 20mm for the built in mirrorless adapter.

Kirk_C

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Re: ART lenses for L mount - why is the 40mm so huge?
« Reply #5 on: April 04, 2019, 10:32:43 pm »

Sigma is going all out for high quality and speed using modern designs & manufacturing processes.

And they're succeeding at very competitive prices. They're really the ones to watch in the L alliance.

I have the 105 1.4 and it's a great lens that is quite easily hand hold-able despite what you may have read. That's what IBIS is for  ;D

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Paulo Bizarro

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Re: ART lenses for L mount - why is the 40mm so huge?
« Reply #6 on: April 09, 2019, 04:57:37 am »

Interesting interview with Sigma:

https://www.dpreview.com/interviews/7487852065/cp-2019-sigma-interview-optical-design-is-always-a-battle-with-the-design-constraints

Yesterday I saw the 40mm lens tested on a French magazine, it got 40/40 on the optical quality department. So it must be good:)

Paul Roark

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Re: ART lenses for L mount - why is the 40mm so huge?
« Reply #7 on: April 16, 2019, 03:32:12 pm »

It appears to make good lenses it is easier to make them big than small...

Yes.  So my route was Sony a7rii, Leica M lenses (where you need the KoloriVision Ultra Thin coverglass swap to match their M9 thin glass design target).  I prefer manual focus.

BTW & OT, relating to manual focus like Leica M glass, with Topaz's AI Sharpen program the f/11 image where the infinity mark is rotated to the f/8 DOF mark, the image is as good at "infinity" as the f/8 image when it is focused on the target and also put through Topaz AI Sharpen -- that is, as good as it gets.   (I may not even need my usual dual-focus stacking procedure any more.  Progress!  Good work Topaz!)

Paul
www.PaulRoark.com
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