LOL I have a 50-500mm that I need a porter for so I reckon I would be able to manage the chunky 12-24mm. Also have an old Pentax 100-300mm that is surprisingly heavy, is it my imagination or has the weight of glass reduced in recent years and if so can someone explain why.

Was going to suggest a watch repairer, they may have a suitable screw and the driver to fit it.

Oh!! Decisions, decisions.

Prefer to avoid fisheye if possible so it looks as if I have 3 choices once I have decided if I want prime or not, so it may come down to what I can afford.

At the moment I only have two prime lens the 50mm and my 105mm macro, I love them both but wonder if having a bit of adjustment helps with composition when it comes to landscape, what do others with experience think? Do I go for a prime and be prepared to move when taking the shot or to crop or take what seems the easier option of having the flexibility of a lens with adjustable length.

P.S. have a bit of a mobility problem so walking or climbing is not always an option.

As I said it is for birds so you can't MF and then retreat to a hide (my office) because you never know where about the bird will be but I think if I use a wider aperture I may manage with guessing where the bird may be but it is a bit hit & miss, think I could do with a remote on the tripod head as well.

For this purpose a wire will not do but for other uses it would be OK but if you have a remote there seems little point.

Managed to do several so was puzzled but then realised I am a subscriber to the magazine well I guess that is what the PU means.

Hi Amin, thanks for your response, are you speaking of any particular unit or do they all work much the same?

I find with the Pentax one that by the time I have managed to focus and then fire on continuous and then managed to turn the thing off I have 100 shots of an empty twig. That is why I am looking for one with a larger button but do not wish to find I get a big button in exchange for the ability to AF.

Sure this is a stupid question but can you AF with the remotes you are advising by half clicking, hope you understand what I mean.

I wish to take birds through double-glazing so I do need to focus first.

Success thank you

Have it in mind to buy myself a wide angle lens. My first question is how wide should one go when using a DSLR to get the sort of view one would with say a 20mm mounted on a 35mm film camera or am I asking too much.

Question 2 is although I would in most cases prefer a Pentax lens sometimes if I am to have it at all I have to buy a different make of lens. Most of my lenses are Pentax or Sigma so advice on these or others would be welcome.