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Full Frame 6x4.5 - What Size Is Yours?

dancqu

Member
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Joined
Sep 7, 2002
Messages
3,649
Location
Willamette V
Format
Medium Format
I've at least a few 6x4.5 negatives that can/should
be printed and mounted full frame. My Bronica
produces frames 42.5mm by 55mm, a .77
ratio. Not a true 3 to 4 but pushing the
.80 4x5 ratio.

Ill need custom cut mats and thought some others
might be interested in mats with the correct 6x4.5
ratio. My .77 may be as close as anyone need
come but Prior to ordering I should average
a few camera's frame size. Dan
 
Most of us custom cut all our mats anyway, while the ratio obviously stays the same everyone prints to different sizes, with different preferences fror margin widths in a frame.

Ian
 
As everyone knows, the golden ratio is defined as a rectangle with a ratio of dimensions thus:



where the ratio of sides satisfies the relationship:



yielding a value of phi when the quadratic is solved:



Conveniently, if one bisects the long side of the golden rectangle, it will yield a rectangle with a ratio of 0.8090, which is very close to the actual ratio realized with the real-world image area of a 6x4.5 negative. So it is very close to one half the magical golden ratio. This mysterious constant pops up again and again throughout the worlds of art and science.

I have found that I can keep all of my single-edged razor blades sharp by storing them beneath a pile of 6x4.5 negatives. However, since it only represents half the golden section, I find that I have to store any double edged razor blades beneath my 12x20 negatives, which more closely approximate the full golden ratio. I still cannot figure out which format I should store my bastard files under in order to maintain their optimum sharpness.
 

Yeah, EVERYBODY knows that.
Perhaps the bastard files might best be stored under a pile of d*****l prints. ?
Ria
 
Ian Grant said:
Most of us custom cut all our mats anyway,
Click to expand...

Such outfits as Redimat and Documount as well as
one APUG sponsor are in the business. They have real
in depth inventories and variation in mount design. With
such low prices and the expertise vouched for by members
of this group is see no reason not to patronize.

I do though acknowledge the temptation of taking on
the challenge. Perhaps later. Right now, with little time
available, I'm preparing a few photos for same size mounts.
So, cost wise two dozen good quality custom size mats with
mounts is my choice. And they from an outside source. Dan
 
When you move away from the standard frame size such as 8x10, 11x14 and 16x20, the SLR ratio of 3:2 is the most popular and that is what I founded Frame Destination on. Since that time, the 4:3 ratio (6 x 4.5) has become more popular. Since most of our customers are photographers I went ahead and added some 4:3 ratio frames to accommodate print sizes 9x12, 10x13, 12x16 and 18x24. The 10x13 and 12x16 we mat to a standard frame size of 16x20 so that once matted, you can use an off the shelf ready-made frame. Our art show customers use mats like this to sell unframed photos in standard picture frame sizes that will not force their customers to custom frame shops. We also carry square and panoramic format and we do full custom for our customers that need very specific sizes and or like to bottom weight their mats. We have a full list of picture frame sizes here.

Cheers,
Mark
 
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