Does anyone here have experience with the Linhof shoe-mounted gadget that optica lly and mechanically shows the view seen by different focal lengths? Is it worth the effort to carry it around as opposed to my trusty card with a 4:5 hole cut in it? The ones I have seen on ebay seem to have a maximum focal length of 360 m m; are some longer? Are they still sold new? Does anyone know of alternative (i. e. lighter or cheaper) gadgets other than a simple card?
Thanks.
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