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  • Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)

New Sigma 18-35mm f/1.8

paul schefz said:
the latest beta still has the lock up issue with this lens...i don't get why it worked fine 2 betas ago...
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It worked, but some f/2.8 lenses weren't hitting f/2.8 so the changes were reverted. The bug is logged and is being worked on.
 
Steve Sherrick said:
This lens is quite amazing for the money.

I have the Nikon version and can confirm it focus in the "right direction" which throws me off from all my other Nikons but will make focus pullers happy.

Zoom and focus are all internal.

I also have a Sigma 50-150 Version 1 which I will do some tests to see how they match.

So, for Run and Gun where I need zooms, my potential combo once completely tested would be Tokina 11-16, Sigma 18-35, and Sigma 50-150.

For smaller rigs (My GH2 and BMPCC), these zooms become even more interesting with a Metabones Speed Booster in line.

Kudos to Sigma for stepping it up with their latest designs,
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Hey Steve, were you able to compare the 18-35 and 50-150?

I've also noticed a rumoured 24-70 F2 with IS potentially coming… Not sure what the better option would be, but if it's like the 18-35 (in that F2 = T2) that'd be a pretty insane zoom range (WITH IS) compared to the competition. F2 is a full stop faster than 2.8… Crazy times.

Also does anyone know a place that does re-barrels for less than $500? I was hoping to get something a little more permanent and consistent than just a fixed Delrin gear. Basically want the front barrel brought up to a standard (80, 90… 114?) and fixed focus gear with proper marks (preferably on both sides so as to be able to see them on either side of the camera). It shouldn't cost $500 since you'd be keeping the lens intact and just adding a sheath over the front.
 
Mike P. said:
Hey Steve, were you able to compare the 18-35 and 50-150?

I've also noticed a rumoured 24-70 F2 with IS potentially coming… Not sure what the better option would be, but if it's like the 18-35 (in that F2 = T2) that'd be a pretty insane zoom range (WITH IS) compared to the competition. F2 is a full stop faster than 2.8… Crazy times.

Also does anyone know a place that does re-barrels for less than $500? I was hoping to get something a little more permanent and consistent than just a fixed Delrin gear. Basically want the front barrel brought up to a standard (80, 90… 114?) and fixed focus gear with proper marks (preferably on both sides so as to be able to see them on either side of the camera). It shouldn't cost $500 since you'd be keeping the lens intact and just adding a sheath over the front.
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Check these guys out...

http://www.pchood.com/电影镜头

As I have pointed out in another thread, their old housings were unworkable because the whole front end turned BUT they have a new version which works very nicely. Cost is $300. No de-clicking (they don't go inside the lens at all) and and a Canon EF lens stays without an aperture ring. You do get a standard front wend (114mm) and a longer focus throw.

I'll try find the other thread where I posted pics...

EDIT: Here - http://www.reduser.net/forum/showthread.php?103496-PCHOOD-CINEMATICS&highlight=PCHOOD
 
I don't like Dan Stilling's story… that's HAGgard. 'Specially since we don't have someone in China to knock on doors (kick ass and take names if they get douchey.) I wonder if GL would consider doing something like that, or if it'd go against everything they stand for (e.g. high quality, functional cine modifications).

That said, anyone else consider a Group Buy? Or know how easy/difficult it'd be to make the a manual/declicked aperture? I guess it doesn't matter if you maintain the EF mount (which is probably what I'd do), but it'd great to be able to reduce that cost by $100… OR get multiple lenses done for a heavy discount… If Sigma release the 24-70 T2, and getting them re-barreled/sheathed was $150ea, that'd be a pretty stellar deal… Especially if the focus marks are accurate and on both sides of the barrel.

OH, and they should make the geared/focus ring the same size as (or just a smidgeon under) the front of the barrel so as to allow for better FF support. PLUS it'd increase the focus throw even further, which actually helps if the rotation isn't actually being changed like they are with Nan's.



Terry VerHaar said:
Check these guys out...

http://www.pchood.com/电影镜头

As I have pointed out in another thread, their old housings were unworkable because the whole front end turned BUT they have a new version which works very nicely. Cost is $300. No de-clicking (they don't go inside the lens at all) and and a Canon EF lens stays without an aperture ring. You do get a standard front wend (114mm) and a longer focus throw.

I'll try find the other thread where I posted pics...

EDIT: Here - http://www.reduser.net/forum/showthread.php?103496-PCHOOD-CINEMATICS&highlight=PCHOOD
Click to expand...
 
Does this lens telescope at all, or is it fixed length?
 
If I was working from a PL mount I'd love to have the GL Optics version of this 18-35 and then the 50/1.4 Art once it comes out to match, if a nice but decently priced cinema mod came out. I feel like if you prefer to shoot wide this would be a great fast setup. The new Sigma lenses seem to embrace being heavier, which seems like a total non issue for cinema use. I think the new 50 is going to be a wide-angle, not double gauss, design. This means a lot of the problems that standard 50/1.4s, like the Zeiss, have won't be an issue only the increased weight will. It's the same route Zeiss went with the Otus, which is a Distagon design.

Kinda off topic, but apparently the 55/1.4 FE mount Zeiss lens for mirrorless systems is just barely under the performance of the Otus for 1/4 the price, so some optimism for the Sigma 50.
 
Just got this lens for a job I had this weekend. It was 2 TVCs with a small crew and very few shots that involved focus pulls. I wanted to try the EF version before getting a rehoused version.
One of the films were shot in a cabin in the mountains with a limited lighting package, and this lens being so sharp wide open really was what made this shoot possible at at all. Very impressed, will get the rehoused version later this year.
 
I'm still hoping for the 24-70 f2 that has been rumoured... Any new news on that? And are there any plans for an 85, 100, 135 ART (at 1.4)?

It'd be great if there was a really affordably PL-mounted Art set. Are there any other zooms (cinema or still that cover s35) that are t1.8?
 
This has become one of my absolute favorite lenses (along with the Tokina 11-16). I just shot a short film, and we used this lens for 75% of all shots, and it is damn sharp.

http://vimeo.com/86740096

This is few month older and just shows how great and useful the 1.8 aperture is (especially in Denmark in the too dark winter).
 
I know. I actually shot both TVCs on this lens alone. Last time we did a film for the same company, the location was a 30min snowmobile ride into a remote cabin, I only had 2.8 lenses back then and was struggling with our minimal lighting package. Not this time, I even shot at 500 ASA this time around.
My lighting kit was limited to a few Kinoflo bulbs I hung from the ceiling in various places, a Phillips Hue kit in the practicals (very handy to be able to dim them as needed from my iPad) and a couple of LED 1*1s (oh, and a fireplace and candles)
 
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This lens certainly sounds great - and I'm a bit tired of waiting on the Canon EF 14-24 mentioned on canonrumors.com long ago.

I gather it will work with Scarlet/Epic @ Quad HD?

1. What's the maximum Dragon resolution when using this lens?

2. This article mentions vignetting @ f/1.8. when using a Canon 50D
http://www.lenstip.com/374.8-Lens_review-Sigma_A_18-35_mm_f_1.8_DC_HSM__Vignetting.html

How much of a real problem is that going to be when using Scarlet @ Quad HD or a Dragon at even larger resolutions?

3. Are there any current RED firmware issues with this lens?

4. Dumb question ... I currently use a Scarlet and am going to need a wider lens for some shots inside a massive warehouse. If I can get my client to sign off on the angle that he needs, how can I translate that into the mm lens I'll need at Quad HD?
 
This lens has really good coverage for such a wide zoom- handles 6KWS on Dragon. I'm pretty sure it will do 5KFF on dragon...need to double check.

Definitely does 5KFF on MX.

Zero Problems at 4K anything on any of the Red family of sensors (in my opinion)

This and an 11-16 should have you covered for ultra wide shots using DSLR lenses...
 
Les, the lens works perfectly on Scarlet with the new firmware. I also used it for stills shooting at 5k FF. I haven't done any thorough vignetting tests but it certainly works fine and produces great pictures. I'll probably get the chance to mount it to the Dragon in about 2-3 weeks.

For the crop factor question go to http://www.red.com/tools/crop-factor that should help you figure it out.
 
Patrick Grossien said:
Les, the lens works perfectly on Scarlet with the new firmware. I also used it for stills shooting at 5k. I haven't done any real vignetting tests but it certainly works fine and produces great pictures.

For the crop factor question go to http://www.red.com/tools/crop-factor that should help you figure it out.
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Patrick,

Has the lens been characterized by Red without issues?

-P
 
Yes it has. It worked ok before (when self implementing it) but it's been officially added to the list with 5.1.38
Pretty fast focusing on auto, too.

Edit: I can only vouch for the Canon mount version
 
Another dumb question:

On the bhPhoto page the format compatibility & focal length for the Sigma 18-35mm are:
Canon (APS-C)
18 - 35mm
Comparable 35mm Focal Length: 28.8 - 56 mm
---
For my existing Canon EF 24-70mm f/2.8L II, the format compatibility & focal length are:
35mm Film / Full-Frame Digital Sensor
Canon (APS-C)
24 - 70mm
---

1. Is the lens a 18-35, or is it really a 28.8-56 with the RED sensor?

2. If this is really a 28.8-56 lens (in comparison to my existing Canon EF 24-70mm f/2.8L II, should I then focus on the Tokina AT-X 116 PRO DX-II 11-16mm f/2.8 which should give me a comparable APS-C Focal length of 17.6 - 25.6 mm?

3. I can use the RED http://www.red.com/tools/crop-factor tool to get the equivalent focal length of a lens depending on the sensor and frame size.

Is there some way to translate this in to an angle of view, so that I can ask my client what angle he requires for the wide shots? If this 'Equivalent focal length' is an absolute 'universal' number, I suppose it would work, but ... the differences in mm from my question #1 make me wonder a bit about this?
 
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Les, the lens is designed for use with APS-C format sensors. So it's vignetting or it portholes when used with a full format 35mm (photography) lens. Because of that dealers often include the calculated lengths when used with APS-C Sensor cameras. (Multiplied by crop factor)
The lengths of any lens are always stated as if it were mounted on a camera with a 35mm ff sensor. The lens itself is a "true" 18-35 it only doesn't work fully on 35mm ff camera. The different lengths you found are calculated including the crop factor the sensor gives you. In this case it should have been x1.6 because that's what the canon APS-C sensors have.
To calculate the ff equivalent the RED MX sensor gives you, use the tool.
The canon 24-70 is a ff lens so it works on full frame lenses. If you mount it on an APS-C camera or a RED you still have to factor in the crop. So the 24-70 is "longer" on a smaller size sensor.

Makes sense?
 
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