andrewhua

<blockquote> <p>Mamiya makes 45mm & 82mm tubes for the RB, and they can be stacked (but not more than one of each).</p> </blockquote> <p>Is it optically unviable to stack multiples of these tubes or just practically difficult to work it?</p>

<p>How does turning a view camera on its side change the swing and tilt movements when a square front standard has movements that pivot from a central point on the top/bottom and on the sides? In other words, how does a square, which is symmetrical, with central pivot points for both swing and tilt, even change when turned on its side?</p> <p>And if a yaw-prone view camera, when turned on its side, achieves advantageous yaw-free movements, why isn't the front standard constructed on its side in the first place?</p>

<p>Hi</p> <p>On some occasions, engaging the depth-of-field (DOF) lever on an RZ lens will close the shutter blades.<br> This usually only happens immediately after attaching the lens and ceases after resetting the lens and reattaching it.<br> Does anyone have experience with this and would know what the cause is?</p>

<p>Thanks, Charles</p> <p>Is no adjustment of the time in the first developer require between the first tank of six sheets and the third tank of only four sheets? Or is your main point here that I should be performing tests? If I happen to be stubbornly complacent about testing would you recommend sticking to 6'15" for the three processing runs as long as the processing is completed within a suitable timeframe?</p>

<p>Hi</p> <p>I intend to attempt developing six 4x5 sheets of Fuji Velvia 50 at a time using 1000mL of working solution (Tetenal Colortec E6 3-bath kit).<br> I would like help clarifying the processing times given the above specified conditions.</p> <p>The instructions provided suggest a time of:<br> 6'15" for the first developer when processing 1-4 films*, and<br> 6'30" for the first developer when processing 5-8 films*.<br> (*a roll of 135/36 or 120)</p> <p>Given that six (6) 4x5 sheets is about proportional to one-and-half (1.5) 120 roll-films, should both the 1st and 2nd lot of six sheets be given 6'15"? Then increased accordingly for subsequent lots?</p>