Thread: Image Circle Database

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  1. #1 Image Circle Database 
    Senior Member Matthew Duclos's Avatar
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    I feel bad for taking over the other thread that this was being discussed on.
    So I figure I would drop it in a new thread for all to see.
    I update the list as lenses pass through the shop here.
    If there are any specifics you would like, just let me know and maybe I can throw one up to test.

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  2. #2  
    Senior Member Yousuf Abbasi's Avatar
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    Any information on image circle diameters for Zeiss T1.3 SuperSpeeds ?

    Thanks for the awesome resource.
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  3. #3  
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    Matthew, your Data Base is coming along GREAT keep up the good work, it isnít everyday that something new is created, somehow it seems that the question of the image circle or diameter has been kept from all of us.

    I do think that the Arri/Zeiss Master Prime and the Red Pro Prime are surprising similar with the Master Prime having the edged. Thatís one of the reason that they deserved to be posted just below the Master Prime.

    Humberto Rivera
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  4. #4  
    Senior Member Matthew Duclos's Avatar
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    Quote Originally Posted by Yousuf Abbasi View Post
    Any information on image circle diameters for Zeiss T1.3 SuperSpeeds ?

    Thanks for the awesome resource.
    Super Speeds coming soon.
    I've had several sets through the shop, but they were rush jobs..
    Not enough time to take a good reading.
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  5. #5  
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    Yousuf correct me if Iím wrong. But the Arri/Zeiss Ultra Prime are listed on the Lens Image Circle Database. The 10mm is a T2, the 12mm is T2, the 14mm is T1.9 and all the rest are T1.9. The only T1.3 are the Arri/Zeiss Master Primes. The RPP are T1.8.

    Humberto Rivera
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  6. #6  
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    Yousuf, I stand corrected! There is a set of Arri/Zeiss Ultra 16mm Lenses made for the Super 16 format, that are on par with the 35mm Arri/Zeiss Master Primes. My apologies.

    Humberto Rivera
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  7. #7  
    Thanks Matthew! It's great that someone with access to all these lenses (not to mention the test equipment) is willing to share this kind of information.

    Just a word of warning to anyone buying lenses for use on Scarlet and/or Epic - until RED release the final specifications of the production sensors, you shouldn't base lens purchases entirely on these figures. For example, it's unlikely that any recording mode on the S35 cameras will require an image circle of more than 31mm. The measurement of 33.54mm that Matt lists on his website refers to the size of the full sensor area (including lookaround).
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  8. #8  
    Senior Member Matthew Duclos's Avatar
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    Quote Originally Posted by Steven Hilder View Post
    Just a word of warning to anyone buying lenses for use on Scarlet and/or Epic - until RED release the final specifications of the production sensors, you shouldn't base lens purchases entirely on these figures. For example, it's unlikely that any recording mode on the S35 cameras will require an image circle of more than 31mm. The measurement of 33.54mm that Matt lists on his website refers to the size of the full sensor area (including lookaround).
    Very true!

    The numbers I have for the future RED cameras are just numbers that I've seen published by RED. I don't know what their real numbers are or will be.
    I chose to use the largest possible sensor size for the RED S35 frame just as a worst case scenario. That way if it's smaller, no problem.
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  9. #9  
    Moderator Evin Grant's Avatar
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    If you use the R1s total, active and useable image areas as reference you can approximate pretty accurately the maximum recordable image circle for the three primary S35 Epic formats. (These do not include look around)

    2:1- 28.5mm
    2.40:1- 27.5mm
    16:9- 26mm
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  10. #10  
    Evin, I think those approximations are a little low - by my calculations it'll be more like:

    2:1- 30.91 (approx 31)
    2.40:1- 29.95 (approx 30)
    16:9- 29.94 (approx 30)

    Full details in the full chart from an old thread.
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