Protect lens/filter holder for long exposure

[Bob Salomon]

Yes it would be a problem, or yes it's recommended to use a UV filter?

I'm using a Rodenstock APO Sironar-S 210mm f/5.6.

You will have no problem with a quality filter. If you shoot color you want a CR1.5. If B&W and color then the UV. Look for a Rodenstock Black line or a Heliopan MC one.

[pepeguitarra]

... generally speaking lenses are not made for long exposure. ...

I am not sure this is accurate. How come they shutters have a B and a T in the speed selector?

[Doremus Scudder]

Doremus, the OP has, in other threads, stated that he needs to use a center filter on a wide angle lens with an ND filter to allow very long exposures. I'm not sure that the Lee system is compatible with a center filter. Do you know? Me, I never touch the stuff..

Dan,

Of course, the center filter would then have to be screwed on to the lens and whatever filter system that was added on would have to be large enough to not vignette. Not impossible, but I don't know the Lee system well either, or which size (if there are even sizes...) that the OP has.

If the OP really needs a center filter and then wants to use screw in filters on top of that, he may be limited to just one more (thin) filter.

From what I've been reading on his other threads, he doesn't really have a good handle on what he wants/needs yet. He'll have to deal with the learning curve. He may find he doesn't really need a center filter and that his metered 8-minute exposure really needs an hour...

Best,

Doremus

[minh0204]

If reflection is your concern, look up "Benro Light Tent Hood Cover". A focusing cloth covering the back of the camera and the bellows is also prudent to protect against light leak entering the dark slide.