lens filters?

Hi, i have a pentax k-1000, with a takumar 28-80mm zoom lens. are there any filters i can get with it?, also are there any filters out there that will allow me to use the B setting on my speed dial during the day?

You don't need to look for any special sort of filter for your lens. If it fits, it'll work, whatever the make.

Alternatively, if you have, or intend to have, more than one lens (taking different sized-filters), buy a filter system, like Cokin. These are fixed to the lens via an adaptor. You then need only one filter of each sort, plus one adapter for each lens.

Explanations here:

http://www.karlu.com/cokin.htm

George

are there lens filters that will allow me to open my shutter for long periods during the day?

You would use a neutral density filter and (ideally) the slowest film you can find and the smallest aperature possible. Having said that, this will only account for a few stop's difference so it is unlikely that you will be able to take a 10-second picture at noon on a sunny day for example (at least with readily available equipment).

Dave

It is possible to buy neutral density (ND) filters, which act rather like sun-glasses, and block some of the light. Whether you can buy one that is dark enough to reduce the light by enough to permit time exposures of several hours, I don't know, but I rather doubt it.

G

2 minutes tops would be enough, im trying to show the passage of time

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=67346&item=3880...

Two or three of these might do the trick, assuming you are indoors and the light is dim.

G

For filters, try also www.srbfilm.co.uk
Matt

Assuming you don't mind losing reflections, try using two polarizing filters. Obviously you'll be using a tripod, so line up your shot, then rotate only one filter until it blocks out enough light for your exposure. The two polarizing filters in series essentially make a variable ND filter.

Thanks, Jester, that is so obvious that I completly overlooked it. Now I don't need go buy a bucket of ND filters, just a ccouple of polarizers.

You will need the front one to be a linear polariser. Circular polarisers 'unpolarise' the light after filtering.