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Cooke s7/i test

Michael Lindsay

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Cooke s7/i test

https://vimeo.com/213668636

This is completley ungraded... and as usual Vimeo is kicking the crap out of the fine detail.

I do need to reprocess at some point as I didn't use the lastest Red colour science.. and I will post a link to that.

Fdtimes has the product details

http://www.fdtimes.com/2017/04/18/cooke-s7i/

I haven't touched any Red setting post shoot. I am going to discuss with Cooke if it is ok to do a proper grade and repost. They obviously are careful about post trickery. They wanted the most honest footage possible and have not interfered with the shots I have used. All errors are mine and there a few optical aritiacts that I left in NOT coming from the lenses. These are due to working very fast, my ND choices and MB positioning. There is also some hints of a familiar OLPF signature for those of you with keen eyes... personally I like them but YMMV.

I don’t normally start threads on this forum but I feel I may have some information relevant to Redusers especially those of us waiting for their VistaVision chips and wondering about what glass to use!

So if people want to ask any questions please ask away and I will do my best to answer them!?… I must apologise in advance that I may be a little slow as I am quite busy at the min.. But I will try to get to everything. Brendan McGinty my partner in equipment will also jump in with his findings.. He shot the stuff with me and spent nearly as much time with the lenses as I did. Charlie, the assitant who helped, may also jump in with his thoughts.

Over the last few years we have been testing different lenses as options for larger format filming. We firmly believe that with bigger sensors, and the more effortless presentation of detail that they allow, our preferences in glass will subtly change. We already felt our priorities change in the move from 4k Red1 to 6k Weapon..

Because of my hunch/theories about big format optics (and the inevitability of big chip next generation cameras) we annoyed Cooke, amongst others, with irksome questions about where are their large format lenses … Serendipity stepped in and just after the BSC show I got the opportunity to have a look at an initial 1st build set of Cooke s7/i.

These lenses cover vista vision+ and are obvious optical partners for Vista Red chips either in a DXL or Weapon body. Also we tested them on a Phantom 65 to look at coverage beyond 40.96mm x 21.60.... so I know they go a bigger than Vista… I believe they will also easily cover the Alexa65 in the smaller 16:9 mode... but not in the Full 2.11 OpenGate.

The lenses available were the 32mm T2, 40mm T2, 50mm T2, 75mm T2, 100mm T2 ….I have not yet had a chance to test the 18mm T2, 25mm T2 or the 135mm T2 as they were not available.... yes they are all T2!

I’d must also thank Sam at RVZ for the use of his 8k Red Vista… Those RVZ guys are very lucky!

and thankyou Jason@love high speed for helping out with the monster Phantom65

We had them for a few days and got very comfortable with them. We ran around London shooting some vistas for a bit... unfortunately we didn’t get great weather but it was clear to us what they are capable of with wide shots. When the sun did show up we bribed my 8 year old daughter and popped to a local park and shot some more daytime shots… We also inc on the back of the edit some crude Bokah shape tests... We have lots of material not in the edits so we have seen them in many difficult siutaions.

I will write in more detail my finding later but for now I will outline my big take away. They are fast modern big format lenses that can deliver loads and loads of detail, albeit in a easy going way. They are also super easy on skin and demonstrate a wrap around Bokeh that is really unusual in a lens that also shows 'infocus' geometry in a modern way. Breathing is well controlled and ergonomics are familiar Cooke! Overall these lenses are very Cooke but also are something new and interesting.

All the lenses are T2 and wide open they are just beautiful.. We shot with the full chip at all times but were often desperate to crop to 2.39 as they feel really great in that aspect ratio... also they foucus close and since you can switch to S35 mode the 75mm which is very close focusing anyway becomes like a macro.

It was exciting to shoot big format spherical... and I only wish Red's chip yeilds would improve fast!

regards
 
Beautiful-looking depth of field, especially wide open. Beautiful bokeh, pretty fast, some nice flare characteristics...there's a lot to like about these lenses! How do they compare size / weight-wise to S4's?
 
Beautiful-looking depth of field, especially wide open. Beautiful bokeh, pretty fast, some nice flare characteristics...there's a lot to like about these lenses! How do they compare size / weight-wise to S4's?

They are manageable in the hand but def heavier.. I'd say maybe 1/4 to 1/3 more weight but I think FDtimes has the exact spec..
 
the shots at 36 and 40 secs show insane amounts of CA. Not a huge fan of that. Did you notice you had to try hard to control it?
 
the shots at 36 and 40 secs show insane amounts of CA. Not a huge fan of that. Did you notice you had to try hard to control it?

gCuQ+


Yeah, lots in the branches right at the beginning of the shot at :40.
 
Would love to see how these measure up to the Sigma Cine Primes. :emote_popcorn:
 
Hi Domenic and Josh

we didn't try and control anything.. ;-)

and we did tried to create problem. Now as you know when shooting fine detail leafless dark branches against a sky that is a fair number of stops over you are asking for trouble. We have masterprimes here and we wouldn't expect to get away completely scot free with that shot with them.

now excuse my lay optics terminology

I felt they had no lateral chromatic aberration problems at all... right up to the edges and beyond the Vista frame (if that makes sense) but showed the familiar Cooke soft focus fall off that when brutally forced, as it is in the shots you mention, and especially when wide open (or close to wide open) creates some magenta/green focus difference. This depth based chromatic aberation is as we see in the shots mentioned very easy for us to remove. However lateral chromatic aberration, which I do find probelmatic, would not be so easy to live with... just my opinion.

However we are also genuinely concerned that we haven't done ourselves any favours with a double down convert... we posted at QHD (from a 8k file) then did a Avid convert to HD for vimeo.... and on my Flanders Oled or our 4k it does look a bit better... less edgy and with more detail.

I will scrutinise the footge a bit tomorow and get back to you... and see if it is worth uploading a different way. I really wanted to online straight to HD with a non-RRX debayer but ran out of time. May not make a difference but wanted to try.

The other thing to bare in mind is that these lenses are the very 1st build set of Cooke s7/i.. and they felt a little prototype... complerely out of my depth here but they may not 100% represent the lens one would buy..
 
No sure if I should start a new thread but we also tested 2 of the new Panchro Clasic/i lenses

https://vimeo.com/213684907

These tests are a little different as there is more from the studio..

saw this test too. did you only have the two lenses? I would love to get more from this test since Ive got a set coming
 
Hi Domenic and Josh

we didn't try and control anything.. ;-)

and we did tried to create problem. Now as you know when shooting fine detail leafless dark branches against a sky that is a fair number of stops over you are asking for trouble. We have masterprimes here and we wouldn't expect to get away completely scot free with that shot with them.

now excuse my lay optics terminology

I felt they had no lateral chromatic aberration problems at all... right up to the edges and beyond the Vista frame (if that makes sense) but showed the familiar Cooke soft focus fall off that when brutally forced, as it is in the shots you mention, and especially when wide open (or close to wide open) creates some magenta/green focus difference. This depth based chromatic aberation is as we see in the shots mentioned very easy for us to remove. However lateral chromatic aberration, which I do find probelmatic, would not be so easy to live with... just my opinion.

However we are also genuinely concerned that we haven't done ourselves any favours with a double down convert... we posted at QHD (from a 8k file) then did a Avid convert to HD for vimeo.... and on my Flanders Oled or our 4k it does look a bit better... less edgy and with more detail.

I will scrutinise the footge a bit tomorow and get back to you... and see if it is worth uploading a different way. I really wanted to online straight to HD with a non-RRX debayer but ran out of time. May not make a difference but wanted to try.

The other thing to bare in mind is that these lenses are the very 1st build set of Cooke s7/i.. and they felt a little prototype... complerely out of my depth here but they may not 100% represent the lens one would buy..


Thanks, Michael. Good point on the T2 detail, obviously being wide open contributes to the CA in that shot.
 
T/2.0 is a really fast aperture for full frame lenses. Depth of field at T/2 in FF is very close to that of T/1.3 in Super 35... so T/2 shouldn't be optimal to shoot... but everyone will try since very shallow depth is so in vogue these days. Poor focus pullers.

The look of the S7's is lovely; thanks for the video. And the Panchro Classics are very close in look to old Panchros, even though there aren't two of the old lenses that perform equal.
 
T/2.0 is a really fast aperture for full frame lenses. Depth of field at T/2 in FF is very close to that of T/1.3 in Super 35... so T/2 shouldn't be optimal to shoot... but everyone will try since very shallow depth is so in vogue these days. Poor focus pullers.

The look of the S7's is lovely; thanks for the video. And the Panchro Classics are very close in look to old Panchros, even though there aren't two of the old lenses that perform equal.

Glad you like it!

Well what is interesting is when we did a rough quick little test with a S35 T1.3 lens agaisnt the T2 S7/i to examine Dof equivalence.. we found if we took into acount the fov difference, basically we used a 65mm T1.3 lenses agaisnt a 100mm S7i the Dof was a hair shallower on the S7i... hope I didn't make a mistake... I used 5k against 8k..

Where I feel very shallow large format can work brilliantly is for sllghtly wider shots when the subject is out 30ft or so... less so when XCU where Dof is super shallow at even T5.6
 
Michael, it would be great if you could start a new thread with the Panchro Classic test. I also have a set of these on order, and I'd love to be able to post and comment just on those lenses.
 
Love seeing this test and I liked that you showed the massive amount of extra FOV in some of those shots.

Nice, stuff, thanks for taking the time. I would love to get my hands on that camera!

David
 
Michael, it would be great if you could start a new thread with the Panchro Classic test. I also have a set of these on order, and I'd love to be able to post and comment just on those lenses.

I'll do that 1st thing tommorrow.. I have some notes from my partner who shot them with me... and I feel really good about them. The only frustration was I just missed out on testing the 40mm as well.

We also looked at 2 nice rehoused sets as well .... and if they keep up the good work with the other focal lengths I think they are a fantastic addition. Personlly we have struggled not having a set of rehoused Pancros (we tried to put together a really nices set 2 years ago)... But as soon as I heard the annoucment last year we jumped in line.....they are very easy to use and for my money the flares are exacly what I want in spherical glass.

lets talk more on a new pancro thread...
 
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