Fujinon EBC 28mm

[Hexaddict]

I found this lens that seems not very common, at least on classifieds like ebay. Is the extra EBC coating worth it ?






Do you know how how to keep the button pushed (dont know the exact word in english)

[Minolfan]

The easyest way is an adapter with flange, that pushes the pin in permanently in use.
I suppose you don't talk about a M42 film camera, that is made for working with this system.

[kansalliskala]

[Ghost2501]

Epoxy ?

[Hexaddict]

Thanks for the info !

[Aanything]

The lens is good, at least, i like it a lot, despite being quite slow.

For keeping the pin pressed I usually disassemble the back of the lens (this is possible for this lens and with all the fujinons I've seen, except the 1.8/55) and wrap a part of the metal pin with a thin strip adhesive tape, so that it remains always pressed.
You may need some tries before getting a strip of the right width, but it's a really easy operation, and it's more easily reversable than glue.

You'll probably encounter another problem using this lens with an adapter: if you look on the back of the aperture ring, you'll find a little protruding part: this was used to activate auto aperture mechanism.
This part won't allow the lens to be totally screwed in an adapter, so you'll have either to dig a slot around about half of the adapter to make room for this little part, or sand this part down with 5 seconds of dremel.

[Pancolart]

You can destroy a crappy Canon FD zoom lens mount and you'll find there at least 2x spring inside. Then you do as Aanything says with little difference: put spring (cut to correct length) on the pin (part that is inside lens of course). This way pin won't be firmly fixed and there will be constant pressure. With some lenses that is the only way to do it since firm / stuck pin prohibits all aperture settings.

If i borrow above photo (pins allways have thick part on bottom so that is changed):

[Arkku]

All other M42 EBC Fujinons except the 55mm f/1.8 can be easily converted to manual aperture by opening three screws around the rear, opening the rear of the lens, slipping a piece of hollow plastic tube (cut from a cotton swab, aka q-tip) over the aperture pin, and then reassembling. The 28mm f/3.5 is easier to dis- and reassemble if you unscrew the rear element group first (use the two circular holes around the rear element), but if I recall correctly this is not strictly necessary.

If the aperture pin seems hard to get out for inserting the plastic, you can unscrew the little lever holding it in, and then replace it after re-inserting the pin. When reassembling the lens, there are one or two pins on the lens side and one or two “forks” on the mount side, that need to be hooked into one another for the aperture ring to function. That's basically the only tricky part.

This modification is completely reversible, so please don't glue the pin or anything like that.