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Old Jul 29, 2010, 3:32 PM   #1
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Default Lens filter protector

These any good:

http://www.premier-ink.co.uk/photogr...er-p-1433.html
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Old Jul 29, 2010, 4:08 PM   #2
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Originally Posted by Koolpc View Post
They should be fine. It is debatable whether you will need one.
That one is for a lens with a 58mm filter thread. This is the right
size for the Canon 18-55mm. I'm not sure, but I think the Pentax
kit lens might be a different size.

If you buy one at all, make sure you get the correct size.
These filters are solely for protecting the lens. I don't think
I would bother fitting one to the kit lens unless you are
going to be using it in a very harsh environment. Lenses
are not that fragile.

IMO, your money would be better spent on something
more useful like a polarising filter.
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Old Jul 29, 2010, 4:16 PM   #3
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Well, knowing how clumsy i am i though it would be a good idea to protect the lens.

It is the Canon i have gone for so 58mm would be right for the 18-55mm IS?

Seen this filter too, any good:

http://www.amazon.co.uk/Marumi-Super...0436668&sr=1-1

http://www.marumi-international.com/dhg/
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Old Jul 29, 2010, 5:39 PM   #4
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One more surface to get smudged and degrade the image. If you don't take good care of your lenses, it might be good, but my experience is it's easier to get a fingerprint on them, unlike a recessed lens surface.
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Old Jul 29, 2010, 6:52 PM   #5
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Originally Posted by Koolpc View Post
Well, knowing how clumsy i am i though it would be a good idea to protect the lens.
Better save than sorry, I suppose. The biggest damage risk
is dropping the lens. The 18-55mm is fairly flimsy so you
don't want to bounce it off the floor too often. The filter
won't give a lot of protection against this type of accident.

Quote:
It is the Canon i have gone for so 58mm would be right for the 18-55mm IS?
Yes. I have the 18-55mm IS and the filter thread is 58mm.

Quote:
Seen this filter too, any good:

http://www.amazon.co.uk/Marumi-Super...0436668&sr=1-1
I haven't used Marumi filters, but I have seen many positive
comments about them. Hoya/Kenko are also good.
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Old Jul 29, 2010, 7:29 PM   #6
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Filters can degrade image quality, and inexpensive filters can degerade image quality a lot.

You can use a protection filter or not, but if you do, don't get cheap ones. And, of course, it doesn't make much sense to spend 50 to protect a 75 lens. Let the cheap lens break and buy a new one. Spending 100 to protect a 500 lens makes more sense.
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Old Jul 30, 2010, 3:58 AM   #7
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But, can you tell the difference between a pic taken with a protective filter than one without?
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Old Jul 30, 2010, 5:29 AM   #8
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Quote:
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But, can you tell the difference between a pic taken with a protective filter than one without?
Sometimes you can. Most of the time, a UV filter on
my Canon 18-135mm has little or no effect on image
quality. If I shoot in the direction of the sun, the filter
often causes reflections and flares. This tendency has
reduced a lot since I bought a Chinese copy of the
Canon lens hood.

I have a cheap 58mm Hama UV filter which fits my
Canon 18-55mm and Sigma 70-300mm. This filter cost
10 (about 8.30) from a local chemist. I find it every bit
as good as more expensive Hoya/Kenko filters. I rarely
use it anywhere other than sandy beaches.
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Old Jul 30, 2010, 6:05 AM   #9
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Quote:
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But, can you tell the difference between a pic taken with a protective filter than one without?
It depends on the quality of the filter, and you can tell the quality of a filter by its cost.

A filter must be made out of pure optical glass, it must be perfectly flat on both sides, both sides must be perfectly parrallel, the coatings must be applied absolutely evenly, and the edges of the optical glass must prevent internal reflections. Plus the mounting ring must hold the filter securely and should allow the filter to be attached, removed, and reattached repeatedly without binding, seizing, or damaging the lens.
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Old Jul 30, 2010, 10:07 AM   #10
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Thing is, i doubt that most people would be able to tell the difference. I am not out to sell my pics etc.

About lens hoods, are they a worthy buy?
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