Hugin 4x5 crop factor

[Ces1um]

Just wondering if anyone knows what the crop factor is for 4x5 film? I use an app called hugin to stitch the left and right halves of a 4x5 scan together that I take with my Harman Titan 4x5 pinhole camera. They ask for the focal length of the cones (150mm and 72mm are the ones I own) and the crop factor. I had googled it and someone suggested 3.4 which resulted in a stitched image but I think that number is incorrect. After applying that crop factor the image seems very shrunk on the working document size. It seems to me that the number should be zero point something or other. Less than 1. (0.x) Can anyone help me?

Also- I'm not sure if this is the correct place to post this. Where it's pinhole related it makes logical sense but this seems like it should go in the hybrid work area. If a moderator wants to move this thread please do so.

 

[wyofilm]

Wouldn't the crop factor for 4x5 be something less than one, as you suggest? DX is 1.5 crop factor to FX. I don't know how different aspect rations are handled.

Empirically testing different values until you get something that looks right, might be the best way to go.

 

[Ces1um]

Wouldn't the crop factor for 4x5 be something less than one, as you suggest? DX is 1.5 crop factor to FX. I don't know how different aspect rations are handled.

Empirically testing different values until you get something that looks right, might be the best way to go.

I found a lot of different values online but 0.29 seems to be the one that works.

 

[ic-racer]

Angle of view for 4x5 film can be derived with a ruler and protractor. What is a 'crop factor?'

 

[Bill Burk]

Ok 0.3 is close. You can use this equivalent chart to find a pair of lenses. 35mm and 4x5. The crop factor would be one divided by the other.
http://www.toyoview.com/LensSelection/lensselect.html

 

[Bill Burk]

What is a 'crop factor?'

How to pick the right lens if you aren’t shooting with 35mm film

 

[faberryman]

0.27

 

[John Koehrer]

Isn't crop factor used in relative sensor size with those other cameras? I guess it's pretty much the same as the Toyo
chart indicates.