Hi all,
I have searched here and google but haven't found anything, but if this is a duplicate please let me know.

I have an 8" f2.9 aerial lens, made I think by air ministry, it was cheap ish but there is some haze between the front elements. I can remove all the front elements from the barrel but have no idea how to separate them to clean the inside.

I know these are of varying quality, and the lens works, with nice highlight blur etc but it is slightly soft and I am wondering if this is just one of the poorer lenses or the haze is impacting?

Any thoughts or does anyone know how to take this lens apart?

Many thanks,
Matt

You'll get a better answer if you ask on http://www.largeformatphotography.info/forum/

Here's a lousy answer. I've taken a few Dallmeyer lenses apart. They just unscrewed. I've never tried to unscrew a Pentac so have no idea of how they went together.

The Pentac has five elements in three groups. The outer groups are cemented doublets, the inner group is a singlet. If you've removed the outer groups from the barrel you've done all that's possible without uncementing the doublets.

The Air Ministry was the customer, bought the lens, didn't make it.

Hi Dan - thanks for the response and also for clearing up about the manufacturer... I have no idea if pentac or dallmeyer made mine but will research further and see what I come up with and if it makes a difference.

I've posted over on the other site and will report back if I get a useful response.

I have managed to unscrew the front and rear sets from the barrel, so it sounds like I am out of luck. There is a small grub screw but removing it doesn't seem to do much.

cheers

Matt