Somewhere there was a little discussion about loupes for focusing, but I can't find it any more. I thought it was in this thread, but there are just a couple of comments on page 1.
Anyway, I thought about this for a long time, since paying 220 Euro for the Rodenstock or Schneider 6x loupe seems really over the top, since it isn't that much more than my lenses cost, individually!
I had the choice between either getting another brand, or going with a different magnification, because for unknown reasons, the 6x magnification is much more expensive than, say, the 4x. In the end, I took my Hasselblad 2000FC/M with 110/2 to the shop, to compare 4x and 6x loupes directly in that ground glass. They unfortunately did not have the 6x in stock, so I played with 2 different 4x loupes for a bit, and found it more than sufficient.
If I am thinking about this right, the detail needing to be focused on is smaller on MF than on LF, so if it works well for MF (which it did), it should also be okay for LF, so I bought the Rodenstock 4x Aspherical loupe, for around 100 Euro. Still a large outlay, but much more reasonable.I also considered a Sylvestri tilting loupe, but had no way of trying it out, so decided on the Rodenstock.
I suppose if I ever find myself getting soft shots due to lacking magnification, I will have to switch or add another loupe. The second-hand value of these loupes is good though, so I would lose little by trying it this way.
I was surprised to see that the loupe comes with neither pouch nor lens covers. What do people do to protect their loupes?
