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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 :)

What lens would you put on Dragon to try and match the Arri 65?

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Brian Merlen

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I have Dragon package with CSC and once the Arri 65 arrives I would like to go in and do a shoot out at the rental house, but am not sure what glass I should throw on to compare it to the custom Arri glass for that particular camera. My plan is the post the raw files from both for everyone to play with, I'll do charts at the very least and hopefully some skin tone testing or something else a little more exciting... So any input on what glass I should use is highly appreciated...
 
I would try to determine whose glass Arri rehoused for 65mm and go from there for the closest match. (I'll bet they did too).
 
I just found the below in an article on the net.. Any idea how to mount hasselblad on a Red (without voiding the warranty with a "non approved" mount)...


ARRI has rehoused Hasselblad lenses -- high-performance 65mm primes and zooms, which include a 50-110 mm Zoom 65, as well as 8 primes that range from 24mm to 300mm.
 
Well if you could get Panavision's 70mm Primo's that would be a start. They will crop coverage on the Dragon sensor since the Arri65 sensor is almost 2x the size of the Dragon sensor even tho pixel count is roughly the same. I believe Phil Holland has had those Primo's on his Dragon.
 
Jason Diamond said:
Well if you could get Panavision's 70mm Primo's that would be a start. They will crop coverage on the Dragon sensor since the Arri65 sensor is almost 2x the size of the Dragon sensor even tho pixel count is roughly the same. I believe Phil Holland has had those Primo's on his Dragon.
Click to expand...

Shhhhh :)

Personally I would say it won't be exactly apples to apples here even using the same glass on both systems, but the PV Primo 70s are the best thing out there for large format cinematography at the moment.

In reality I would just use the best glass available for both tests. The hassy glass is good, but not as good as some of the cinema glass that covers smaller formats.
 
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I would just use the best glass possible on the Dragon for the test, there's nothing to be gained by using something less. Now if you are worried about contrast more than resolution, you may want to find glass that matches the contrast of the Arri-65 glass, but otherwise, just use the sharpest lenses you can find.
 
You'd have to open a lens on a Super-35 sensor camera by 2-stops to match the depth of field of a 65mm sensor camera, so if you were going to try and match DOF, then you'd need some solution like that, but if you were trying to compare resolution, not DOF, then you'd shoot at the optimal f-stop of the lens.
 
There's Metabones Speedbooster next project right there - Hasselblad to Dragon???
 
Again it depends on if you want to test resolution or are trying to match depth of field. If the first, then shoot 2-stops closed from wide open as a general rule. If the second, open up 2-stops on the 35mm camera compared to the 65mm camera.
 
In general lenses are designed for a specific format and even though You have a 65mm for anything between 8 mm film to 6X9 Medium format stills, the resolution of a 65mm Mamiya on a 8mm Bolex
will likely be pretty bad. I would suggest the best glass for the format, probably the Masters, Leicas, Ultras and even L Canons and some EF-S. My feeling is that the image quality after the glass is more
a matter of compression, dynamic range and color management. I believe that the larger negative (chip) will produce a more lifelike reproduction simply because it has a smaller magnification factor with its shallower depth of field actually being more of a liabilty than an artistic advantage.
 
David Mullen ASC said:
You'd have to open a lens on a Super-35 sensor camera by 2-stops to match the depth of field of a 65mm sensor camera, so if you were going to try and match DOF, then you'd need some solution like that, but if you were trying to compare resolution, not DOF, then you'd shoot at the optimal f-stop of the lens.
Click to expand...

Yes what David says is whats relevant. You would need a lens that is as sharp 2 stops more open, So close down the Arri 65 2 stops and ND the dragon with the best resolving lens that you have to match the DOF and further more you would need to use about half the focal length on the dragon to match the FOV...

So twice as wide, twice as open would be quite close.


Dan Kanes said:
http://www.samys.com/mp/Lens-Adapte...oduct-search&gclid=CIDvlrC_osECFROTfgodSy8Ahg

Hasselblad to eos mount adapter - would want to likely use a titanium EF mount if you could and make sure that the lens plane is perfectly flat with the adapter.

best,

dan
Click to expand...


Using mid format lenses on the dragon would only give you less resolution on the dragon. As the dragon would only crop out a quarter of the image circle of a mid format lens. So better use a lens that has coverage for the dragon sensor and again, open up and use a wider lens...


Best option would of course be a XPL to PL speed booster. Possibly something arri will make to those lenses so they can be perfectly matched on normal alexas when used as B cams and such.
 
Brian Merlen said:
I just found the below in an article on the net.. Any idea how to mount hasselblad on a Red (without voiding the warranty with a "non approved" mount)...
Click to expand...

If you use Red's Nikon or Canon mount, there are plenty of Canon- (or Nikon-) -to-Hasselblad adapters.

Edit: oops Dan beat me to it
 
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