Originally posted by Atindra I am looking for a telephoto/zoom lens. I want a good lens for birding at low cost. I know this is contradictory and good birding lens costs a lot but I found some manual mirror lenses with fixed focal lengths like Sigma's f/8 600mm etc.
My question is how mirror lens works?
And is anybody having field experience with this particular lens? How good is it for birding? Examples will be highly appreciated
Atindra
Atindra,
I may not be an expert in this but I do have a lot of experience taking bird photos.
First I'd think in terms of magnification. What magnification will you need?
If you are going for small perching birds, about the size of sparrows, the bare mininum would be 15x and greater. In other words at
least a 500mm lens and preferable longer. This is the size bird I mostly go for and I use 600-1000mm effective FL glass. See my photo gallery for the kind of birds I'm talking about.
Although you could get by with a shorter glass for larger birds like the waders, egrets, geese, herons etc, they are often far away or out in an inaccessible flooded marsh where you can't get close to them.
One thing I want to disabuse you of - don't think, no matter how much money you have, that you will be able to snap on some super lens and wander about in the wood taking snapshots of birds. It just doesn't happen that way. You will need a good understanding of a bird's behavior and their habitat, a tripod, perhaps even a blind (a "hide" in the UK). The most important "gear" you need for bird photography is an understanding of their behavior and habit preferences and a lot of patience.
My advice considering your limitations? - get an inexpensive 300mm and get out in the field and practice your field craft. Learn where to find them and how to approach them up close. The skills you learn will be more important for wildlife photography than any hardware you may buy.
Wildman