emulate a 35mm FOV in a 35 mm adapter ?

Y

Yuriko Baba

New member
Hi all,

I was searching around and I'm looking for a post by Barry Green that shows you how to emulate a 35mm FOV when using a 35mm adapter. Does anyone know where I can find it.

Many thanks in advance.

Yuriko
 
I have no idea where to find it and I lost the message on how to do it.

BUT

I think you do this: Get a standard 8.5 x 11 Sheet of paper and tape it up horizontal.

Put the Camera 2 feet back away with a 50mm Lens on it and then zoom in that frame until you've chopped about a 1/4" of the sides off.

On an HVX this equals about Z27.3mm or Z82.
 
Last edited:
A 35mm movie camera, using a 50mm lens, has a field of view of about 10.5" at a distance of two feet. So, as Kholi said, take an 8.5" x 11" sheet of paper and tape it up landscape-wise, so it's 11" wide. Put the film plane (pretty much an inch and a half behind the back of your lens) at a distance of 2' from that sheet of paper, and then zoom in so that you're just barely cutting off the sides of the paper (1/4" off each side would be ideal). At that zoom setting you should now be emulating the frame size, field of view, and depth of field of a 35mm movie camera.
 
Yuriko Baba said:
Hi all,

I was searching around and I'm looking for a post by Barry Green that shows you how to emulate a 35mm FOV when using a 35mm adapter. Does anyone know where I can find it.

Many thanks in advance.

Yuriko
Click to expand...
I think that you got the answer that you were looking for. I hope that you wanted to know this because you have 35 mm film camera lenses and not SLR 35 mm lenses.

If you don't, then you would get a totally different DOF look using your SLR lenses with FOV framing.:shocked:
 
Douglas, not everyone wants to use SLR FOV.

A lot of us are pretty happy with trying to conform to a long-standing standard. Especially if it LOOKS right.
 
Kholi said:
Douglas, not everyone wants to use SLR FOV.

A lot of us are pretty happy with trying to conform to a long-standing standard. Especially if it LOOKS right.
Click to expand...

If you are happy with the result you are getting, then don't change what you are doing.

I am just saying that a 50 mm SLR has the DOF of a normal lens wether you crop to FOV or not. The look of a 50 mm SLR is more in par with the look of a 28 mm film lens.

A 50 mm SLR lens cropped to FOV is the equivalent to +- 100 mm tele without the compression qualities.

I personally work all through the camera zoom range to get the look I want. (HVX from 18 mm - 55 mm) I get full 35 mm SLR at 20 mm, so I try to stay above that all the time to prevent vignette.
 
50mm = 100mm Tele FOV and DOF.

By the way, Douglas, I honestly wanna know how you calculated that because I used to do the same thing you're doing now. Zooming in and out. Makes me want to re-test Zoom settings, FOV, and DOF again to make sure I'm truly happy with emulating the 35mm FOV.

I found that stayin' @ 27.3/35mm FOV fixed all of that. Zooming in further actually looks better to me, but I try to stay between 27.3 and 39/40.4 for test shooting.
 
Last edited:
I can only speak for what I have. I have the LEX. The LEX is made to use full SLR lenses.

If you use a normal SLR lens (50 mm) and then you crop it to were you would use a 28 mm as a normal film lens, in effect you are doubling the 50 mm. (100 mm)

That is my simple math.

If you own both film & SLR lenses do a test (a 28 mm film and a 50 mm SLR both with the same cropping. And also 50 and a 50) and please post so we can see.
 
Douglas Villalba said:
I can only speak for what I have. I have the LEX. The LEX is made to use full SLR lenses.

If you use a normal SLR lens (50 mm) and then you crop it to were you would use a 28 mm as a normal film lens, in effect you are doubling the 50 mm. (100 mm)

That is my simple math.

If you own both film & SLR lenses do a test (a 28 mm film and a 50 mm SLR both with the same cropping. And also 50 and a 50) and please post so we can see.
Click to expand...

I own the Letus Extreme as well.

I can tell you right now that 20mm zoom and 27.3mm zoom does not equate to a 50mm mimicking a 100mm or vice versa at all. The FOV is still not as wide or wider, depending on your switch.

I stood in the living room with a stand-in (Neko Kitties r0x) trying out Academy and Full SLR, there's a difference. Whether it WORKS for you is a different matter of course, we all know that. But, I can't see how you got the 50mm = 100mm DOF straight from camera.

I don't have Cinema Glass on hand, sorry.

I will say this: The RED ONE is capable of attaching SLR glass. So is it made to use SLR sized frames? You would get the same FOV, on RED ONE, from a 50mm Nikon and a 50mm Zeiss SuperSpeed is my guess.

As these things are made to mimic film, adapters included.

Again, it boils down to preference, but I have yet to see an example of SLR sized frames looking any kind of proper as far as FOV and DOF goes.
 
We are going to have to wait until someone can do the physical test to prove my theory. (I have worked with different lens formats but I've never used anything on the LEX other than SLR lenses)
 
You can do the test with SLR lenses. It won't make a difference. You know for a fact that 20mm is not going to work with PL Glass. So, find the value that works for PL glass on your HVX + Letus Extreme then apply it to your SLR lenses.

Your SLR lenses will have the same FOV as Cinema Glass regardless when zoomed into the proper frame.
 
Kholi said:
I will say this: The RED ONE is capable of attaching SLR glass. So is it made to use SLR sized frames?
Click to expand...
No, it uses cine frame sizes.

You would get the same FOV, on RED ONE, from a 50mm Nikon and a 50mm Zeiss SuperSpeed is my guess.
Click to expand...
Of course you would. 50mm is 50mm, regardless if it's coming from a 16mm movie camera lens, a 35mm still camera lens, or a 6x7 large-format camera lens. 50mm is 50mm. Put any 50mm lens on a Red One and you'll get the exact same DOF and FOV.

You will not, of course, get the same DOF and FOV from a 50mm lens on a Red, as you would from a 50mm lens on a 35mm film SLR.
 
Douglas Villalba said:
If you use a normal SLR lens (50 mm) and then you crop it to were you would use a 28 mm as a normal film lens, in effect you are doubling the 50 mm. (100 mm)
Click to expand...
Not sure what you're saying here; what do you mean a 28mm normal film lens? If you set your FOV to match a 35mm cine frame, then a 28mm lens will look like a 28mm lens on a 35mm movie camera.

It will not, however, look like a 28mm lens on an SLR. The frame size is about half; you'd have to use a 50mm lens on the SLR to get about the same FOV as a 28mm lens on a cine camera.
 
Barry_Green said:
No, it uses cine frame sizes.


Of course you would. 50mm is 50mm, regardless if it's coming from a 16mm movie camera lens, a 35mm still camera lens, or a 6x7 large-format camera lens. 50mm is 50mm. Put any 50mm lens on a Red One and you'll get the exact same DOF and FOV.

You will not, of course, get the same DOF and FOV from a 50mm lens on a Red, as you would from a 50mm lens on a 35mm film SLR.
Click to expand...

And that's my point. I thought the objective of a 35mm Adapter was to mimic 35mm DOF and FOV. That was the Mini35's mantra, not SLR sized frames. Am I wrong about that? (Not asking you, Barry, but in general. )

I can see some special occasions where you could go outside of that. Music Videos could benefit from the non-linear look! Commercials, etc. I mean it's okay to have it there just in case and if used properly it will probably look fine or even GREAT.

But, after I learned the proper FOV measurement it became a question of: Why give myself a headache over it instead of just using what's there? Especially if it looks right?

Different eyes and different strokes, I suppose.
 
Barry_Green said:
A 35mm movie camera, using a 50mm lens, has a field of view of about 10.5" at a distance of two feet. So, as Kholi said, take an 8.5" x 11" sheet of paper and tape it up landscape-wise, so it's 11" wide. Put the film plane (pretty much an inch and a half behind the back of your lens) at a distance of 2' from that sheet of paper, and then zoom in so that you're just barely cutting off the sides of the paper (1/4" off each side would be ideal). At that zoom setting you should now be emulating the frame size, field of view, and depth of field of a 35mm movie camera.
Click to expand...

Thanks alot Barry, Thanks for the help too Kholi . And all those who helped

I need to understand how to get what is standard.

So this applies only to Film camera Lens? and not SLR lens ?
 
Barry_Green said:
Not sure what you're saying here; what do you mean a 28mm normal film lens? If you set your FOV to match a 35mm cine frame, then a 28mm lens will look like a 28mm lens on a 35mm movie camera.

It will not, however, look like a 28mm lens on an SLR. The frame size is about half; you'd have to use a 50mm lens on the SLR to get about the same FOV as a 28mm lens on a cine camera.
Click to expand...
Hello Barry,

Sometimes I don't even understand myself, but lets see if I can explain it.

Here is a equivalency chart of lenses with different formats. the only thing that changes is the DOF not the angle of view. (Just for illustration, not presize mm per mm)

cine- _____SLR-_____6X6 cm
28 mm ___50 mm ___80 mm
50 mm ___100 mm _150 mm
100 mm __200 mm _300 mm

If you follow me so far, then a 50 mm SLR framed to cine acts as a tele's angle of view but keeping its quality of a normal lens. Now a cine 28 mm has a normal lens qualities while a 28 mm SLR shows wide angle qualities and distortion.

We may be saying the same thing here, but from a different point of view.
icon14.gif
 
You must log in or register to reply here.
Back
Top