Fuji G690 rise and fall

[brian_walton]

<p>Can anybody help me who has a passion for mathematics.<br>

The exposed neg on my 690 is 56mm X 84mm<br>

If I put my trusty G690 Fuji level on its side and use only 56x56mm of the film how much (in degrees) of rise and fall do I get if I take advantage of the rest of the negative?<br>

Don't worry I'm just cheap..I don't want to buy a field camera!<br>

with thanks<br>

Brian</p>

[andylynn]

<p>I think it would be 1/6 of your field of view. I think.</p>

[david_littleboy__tokyo__ja]

<p>(84 -56)/2 = 14mm of rise/fall. It's a lot more if you crop to a 2:3 rectangle: (84 -38)/2 = 23mm.</p>

<p>You are throwing away a lot of film, though.</p>

[ondebanks]

<p>To work this out in <em>degrees</em> , we would need to know the focal length of the lens. 90mm?</p>

[david_l3]

<p>A medium format panoramic camera would be better for your idea. However that type of camera will cost much more than what a field 4X5 with one lens would cost you.</p>

[tony_cunningham]

<p>I used to do this a lot with my GSW690 (65 mm lens). It worked fine and I often gave the image an additional tweak in Photoshop. 56x56 mm is still quite a large negative and it is a lot easier and cheaper than using a shift lens or field camera! I posted about this here I think - long ago.</p>

[david_l3]

<p>Tony brought up a thought, Lens Correction in Photoshop corrects perspective, but with a loss of some edges in the frame. I use it to lessen vertical convergence. </p>

[tony_cunningham]

<p>Yes, I felt that the double technique minimised the amount of perspective correction needed in Photoshop.</p>

[eduardo_cervantes]

<p>Many years ago, I made a 645 mask out of plastic for my Hasselblad A12 6x6 magazine when shooting reversal film. I could insert it with the masking up or down. Depending on subjects, I could manage to gain a few mm of rise. For 2, 3 or 4 story buildings it worked great. For interiors the mask worked for "fall". <br>

Eduardo</p>