I haven't seen any of your images, neither have I made any comment on them. Having read this entire thread I do wonder why you chose the signature line that you have.

Are you quoting somebody else's words? If so, who.

Care to educate us?

Also, I would urge you to reconsider your decision to leave this site, especially as it seems it is based on one comment about one photo. It'd take a lot more than that to make most of us leave. Of those that have left, it was quite a temporary absence.

There is no technical reason that I can think of why that should be.

I think it is more likely to have been a marketing decision to prevent multi-user/machine access to the catalogue and all the record locking that would be necessary.

Stefan, Catalogue file. Photos can reside on a network drive, but the catalogue can't.

One thing that I find annoying in all versions of Lightroom so far is its inability to use a networked drive for its catalogue.

Interestigly. Bojidar uses the same image to illustrate both versions. Mine is the 'smc' version. I don't really think there is any difference in the mechanics or optics, only cosmetics.

Is your dioptre adjusted properly?

As far as I am aware, the FF/BF issue only affects AF lenses when using AF-S/AF-C focussing, not manual.

Other than that I can't offer any explanation for your problem. Do you have other lenses you can try at infinity?

Any news on this?

Absolutely not. Although it is the slowest if the 'nifty fifties' at f2, it is still a very good lens for the money.

You'd have to pay double that for a f1.7 version, much more again for the f1.4. Then there's the f1.2, the fastest, and most expensive, of the lot.

OP: You need to supply a lot more information about your problem.

For instance, if you have your camera attached to a telescope and taking 30 minute exposures of deep space objects, the noise reduction system will take another 30 minutes to develop it's black frame which it uses to remove noise from the original exposure.

So, 1 x 30 minute exposure will take 60 minutes to appear on the rear screen. Similarly, a 10 second exposure will take 20 seconds if you have NR turned on.