Here are the lenses I'm looking to put center filters on:
58mmXL 72mmXL 110mmXL 150mmXL
If anyone has used Heliopan filters instead of Schneider, I'm curious as to why. Also, do I need a spacer for any of the lenses to keep the center filter from m aking contact with the front element? Last but not least, what Heliopan filters would I need so I can be sure to get the right size (if I don't go with Schneide r) and where is the best place (read: least expensive but still reliable) to pur chase them from?
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