In working with Sinar equipment, I dislike Sinar bag bellows. There’s too much material, to the point that the bellows can bind up between the standards when using short lenses. Of course, this makes it all the more difficult to make adjustments.
As to a possible reason, perhaps it was Sinar’s intent to have these bellows extend far enough to work with 180mm or 210mm lenses, and thereby cut down on having change to and from the normal bellows? After all, the reason to have two sets of bellows in the first place is to facilitate flexible adjustments with all lenses.
The following photos help to illustrate the problem. They show the bellows being used on my Sinar Norma/F hybrid camera with a 58mm super-wide lens. The distance between the standards was determined by focusing an image on the ground glass using this lens.
The point of this DIY thread is to document the simple procedure I used to correct this problem with my set of Sinar bag bellows.
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