1. ## Angle of View

I took some measurements from a Rodenstock 240mm Sironar S, I have.

I am trying to understand how much distance I will have in the frame of an 8x10 camera, Landscape.

The specs for the lens state an Angle of coverage of 75 degrees.

I took the camera out and took some measurements:

Lens to Subject = 9ft

Landscape width measured = 8ft 3in

to my Calculations this gives an Angle of Coverage of 50 degrees, not 75...

Is my missing connection, focused at infinity?

Neil.

2. ## Re: Angle of View

Hard to tell from the information given... are you confusing angle of view and angle of coverage?

Joel

3. ## Re: Angle of View

The published image circle for the 240/5.6 APO-Sironar-S is 372mm.

Is that your lens, or do you have a SINARON-S ?
This was a Sinar-branded Rodenstock Sironar-N lens. Its image circle is 340mm.

Both image circles are at infinity and f/22.

- Leigh

4. ## Re: Angle of View

http://www.largeformatphotography.in...e-focal-lenght

5. ## Re: Angle of View

Originally Posted by Bruce Watson
http://www.largeformatphotography.in...e-focal-lenght

Very good thank you.

6. ## Re: Angle of View

Image circle 372mm & 240mm FL = 75.55 degrees coverage, as claimed.

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