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F-23 Measure Hook / Focus reference mark with DigiPrimes


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#1 Teo Lee

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Posted 15 August 2008 - 12:08 AM

When I Shoot F-23 with DigiPrime Lens.

I confuse.

F-23 has two method of Measure Hook(Focus Reference Mark).

Could you tell me where is right way? with Digiprime Lens.

Help me!!!
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#2 Stephen Williams

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Posted 15 August 2008 - 02:34 AM

When I Shoot F-23 with DigiPrime Lens.

I confuse.

F-23 has two method of Measure Hook(Focus Reference Mark).

Could you tell me where is right way? with Digiprime Lens.

Help me!!!


Hi,

There is a whitness mark where the focus point is, you will need to set the back focus ideally with a sharpmax collimator.

Please use your full real name, it's a requirement of this forum.

Stephen
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#3 Mark August SOC

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Posted 19 August 2008 - 01:00 PM

When I Shoot F-23 with DigiPrime Lens.

I confuse.

F-23 has two method of Measure Hook(Focus Reference Mark).

Could you tell me where is right way? with Digiprime Lens.

Help me!!!



One of the dilemma's is all HD lenses are not calibrated to the same film plane even though they were all manufactured to work on the 2/3? triple CCD array.

The second dilemma is that the Cameras are marked with different film planes from manufacturer to manufacturer and model to model. Here is the big thing to ask when renting an F23 during your prep. On the focal plane plate sony has both markings of 48mm colored orange and 65mm colored white. Ask your prep tech at the rental house to set it based on your Dp's lens package. At Panavision Hollywood we set the camera during service to match the lens going out. There have been crews going out when both are needed and we have show the AC's how to check and set the flim plane plate for there shoot during there prep.



Here?s what we have discovered so far here at Panavision Hollywood???.(we are still testing lens with the F23)



Lenses set to 65MM Focal plane

Panavision Digital in B-4 (PV mount is 70MM)

Zeiss

Fujinon E series



Lenses set to 48MM Focal plane

Canon ?new Cine-style?



Cameras

Sony 950, 900R, 900S, Betacam, DVcam = 48MM focal plane engraving

Varicam = 48MM focal plane engraving

Viper = 48MM Focal plane engraving

Panasonic P2HD, HDX900, SDX900 = 48MM Film plane engraving

Panavised F900 = 65MM Focal plane engraving

F23 = 48MM and 65MM Focal plane engravings (reversible plate, white mark= 48MM, orange mark= 65MM)

Here is the big thing to ask when renting an F23 during your prep. On the focal plane plate sony has both markings!


If you have questions on any camera ask during your prep when checking your marks on all of your lens. Ask! Thats why Pro Camera crews going out of our office here are preping all day checking camera and lens and they still ask questions. Thats why there working and why I call them PRO's!

Hope this has helped. All the best!


Mark August, S.O.C.
Panavision Hollywood
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#4 Teo Lee

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Posted 24 August 2008 - 09:21 AM

Mark~ I have a question.

Which one is right engraving?

65mm white & 48mm orage ? or 65mm orange & 48mm white ?


Anyway..

When I shoot F-23 with Digiprime Lens

white mark is accurate measuring of distances then orange mark. In my experience...


Thak you for help of Mark and Stephen.
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#5 Mark August SOC

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Posted 25 August 2008 - 10:43 AM

Mark~ I have a question.

Which one is right engraving?

65mm white & 48mm orage ? or 65mm orange & 48mm white ?


Anyway..

When I shoot F-23 with Digiprime Lens

white mark is accurate measuring of distances then orange mark. In my experience...


Thak you for help of Mark and Stephen.




Teo,

I have re-read what I wrote and see I have posted two different anaswers on the focal plane engravings. The correct answer is on the F23 = 48MM and 65MM Focal plane engravings (reversible plate, white mark= 48MM, orange mark= 65MM). Sorry for any missunderstand and for pointing this out! Most B4 mount lens are using the orange 64mm focal plane.

Again Thanks,

Mark
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