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Old 21-11-2006, 09:34 AM
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iceman (Mike)
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Question UV filters

Hi all

I'm after a 72mm UV filter for the Sigma 17-70mm and 2x 52mm UV filters for the 50mm f/1.8 and 28mm f/2.8 that i've bought recently.

Anyone have any recommendations on the best place to buy them at a cheap price?

I got the Hoya 58mm UV for the stock canon lenses off ebay, and they look/work fine, just after any alternatives or recommendations.

Thanks
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Old 21-11-2006, 09:39 AM
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Also are there any different types that I need to be aware of?

Just had a quick look at ebay, and they seem a lot cheaper than when I last bought them.. ie: approx $10, + postage, so under $20 in total each.
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Old 21-11-2006, 11:37 AM
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Hi Mike look here for a quick explanation of different quality UV filters.

http://www.centre.net.au/Filters_0007LG.html

This is where I got mine. You can pick from $20 to about $80. As usual you get what you pay for. Depends on use. It is always better when taking star images to remove any UV filters. The real advantage of the multicoated UV filters is to stop flare from bright sources. The optical quality is also better. Whats the use of an exquisitly crafted lens better than 1/4 wave and add on a filter that is many waves from flat and or parallel.

Hope this helps.

Bert

Last edited by avandonk; 21-11-2006 at 11:57 AM.
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Old 21-11-2006, 12:55 PM
gbeal
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Mike,
I second Berts comments. I dislike them, but given a fair percentage of the DSLR use is from an aircraft, the chances of smacking the front element are right up there.
Also at night, while I would like to not use them, the chances of dew come into play, even with a dew heater. I would rather clean the dew off the filter, than the front element.
Get a decent quality one though, and this normally relates to how much you pay.
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Old 21-11-2006, 01:30 PM
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I have found filters a real pain and found the coating's are easily damaged with cleaning. I used a filter in front of cooled CCD and found that after a couple of incidents where condensation mist formed the coatings became damaged.

For comparision when I first got my 100mm Canon lens I managed to dew up the front element a number of times (before I got smarter with avoiding condensation) and each time I cleaned the lens afterwards to remove the residue. But the coatings are still perfect.

I only use filters when necessary.

Terry
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Old 21-11-2006, 01:49 PM
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Thanks for the opinions so far.

Terry what about terrestrial shots? I'm under the impression that UV filters help cut down glare for long-distance shots, for example of a mountain range etc.
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Old 21-11-2006, 03:14 PM
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Mike,

Yes for long distance shots I think a UV filter is a good idea. Most of my shots tend to be close range (or very far!) and I never use a filter.

Having said that there is a chance I might have a 52mm filter around. If I find one I'll send it down (free of charge of course!) as I no longer have a need for that size.

Terry
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Old 21-11-2006, 07:28 PM
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Hoya's go:

Green case - Very cheap and nasty Phillipines manufactured
Purple case - Cheap Japanese manufactured
Grey case HMC - multicoated Japanese
Black case Super-HMC - mulitcoated Japanese
Black Case Pro1D - Even more expensive

The hoyas are hard to clean. If you want the best the B+W mulitcoatedes are the best but very much $'s.

Last edited by petal666; 21-11-2006 at 09:40 PM.
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Old 21-11-2006, 09:51 PM
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I couldn't find a decent one in my collection (well I found one on an old 135 f3.5 Pentax lens thats about 30 years old....but I don't think you would want that!)

See Ben has one for $20

Terry
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Old 22-11-2006, 06:55 AM
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iceman (Mike)
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Thanks for the info Ben, very helpful considering most of the ones on ebay are green cases

Thanks for looking Terry.
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