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#11
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Thoughts on "Multicoated" lens filters
Dave wrote:
i did a ton of travelling earlier this year and got my camera lenses quite dirty at times. (did my best to keep them clean but i was in crazy places...) i wiped them gently with anti-static cloths but i didn't feel good about it. Don't worry overmuch. should i buy "Multicoated" lens covers (i believe a.k.a. Neutral Density Glass Filters)? has anyone used them? If you feel better, use protection filters, but unless you want no more than 640x480 web resolution, you want good lenses --- and good filters, lest they compromise the lenses' image quality. And lens hoods (which also protect lenses against many, but not all, things). And you probably want sealed lenses and camera bodies and flashes. :-) At least if you go into seriously bad weather. And if it *really* gets rough (say lots of sal****er or fine sand in the air, dropping into the mud with the camera, etc.) some underwater protection gear may be called for. -Wolfgang |
#12
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Thoughts on "Multicoated" lens filters
Tony Polson wrote:
No-one has ever produced comparison shots that showed any deterioration in image quality when using a good quality filter. Can you prove your statement? -Wolfgang |
#13
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Thoughts on "Multicoated" lens filters
Wolfgang Weisselberg wrote:
Tony Polson wrote: No-one has ever produced comparison shots that showed any deterioration in image quality when using a good quality filter. Can you prove your statement? Can you disprove it? Please go ahead and do so, because I would be very interested to learn of any objective research, based on carefully controlled experiments, that disproves it. Over to you! Or are you just a troll, as your other posts would seem to suggest? |
#14
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Thoughts on "Multicoated" lens filters
On Aug 10, 12:32 pm, Tony Polson wrote:
Wolfgang Weisselberg wrote: Tony Polson wrote: No-one has ever produced comparison shots that showed any deterioration in image quality when using a good quality filter. Can you prove your statement? Can you disprove it? Please go ahead and do so, because I would be very interested to learn of any objective research, based on carefully controlled experiments, that disproves it. Over to you! Or are you just a troll, as your other posts would seem to suggest? THANKYOU to everyone who responded - i've been carefully following your responses. while travelling i did notice that it was my wider lens that were taking more of a beating - and it makes sense as more lens surface is exposed. i'll pickup a good MC lens of some sort (possibly UV filter - although i've read the pros never use these). also, i agree HOYA lenses are not the greatest so i'll stray from there this time. i will experiement in varying lighting conditions and see how goes. thanks again. |
#15
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Thoughts on "Multicoated" lens filters
Dave wrote:
THANKYOU to everyone who responded - i've been carefully following your responses. You are very welcome, Dave. while travelling i did notice that it was my wider lens that were taking more of a beating - and it makes sense as more lens surface is exposed. i'll pickup a good MC lens of some sort (possibly UV filter - although i've read the pros never use these). also, i agree HOYA lenses are not the greatest so i'll stray from there this time. The UV filter is the correct one to use. It has no colour cast whatsoever but has the added slight benefit of reducing UV transmission which affects both film and digital capture. Take care with wide angle lenses. A filter can cause vignetting (severe light fall-off) at wide settings, so make sure that you buy a brand that has a narrow filter ring which won't obstruct the lens's field of view . Some brands offer special thin rings specially designed for wide angle lenses. They often omit the front thread so you would not be able to add a second filter. But the thin ring is almost a guarantee of no vignetting. Avoid brands such as Tiffen with very wide rings. I know Tiffen filters are very popular, but so are McDonalds hamburgers. The fact they are popular doesn't mean that they are the best available. You are right in that many pros don't use filters, but their employers generally buy the lenses that they use. g If you saw the condition of the front elements of the lenses used by many photojournalists, you would run straight to the camera store and buy a UV filter for every lens that you owned! i will experiement in varying lighting conditions and see how goes. thanks again. Good luck. Let us know how you get on. Please feel free to ask any further questions. It is worth asking questions about the specific lenses you are using because, chances are, other people on the newsgroup will probably have used the same lens and will be able to offer advice about which filters work best. |
#16
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Thoughts on "Multicoated" lens filters
Dave wrote:
should i buy "Multicoated" lens covers (i believe a.k.a. Neutral Density Glass Filters)? has anyone used them? And, if the miraculous (so people keep saying) Pentax SMC lenses have the best coatings, wouldn't Pentax filters (if indeed there are any such things) be the best? Daniele |
#17
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Thoughts on "Multicoated" lens filters
"Bob Salomon" wrote in message ... In article . com, Dave wrote: should i buy "Multicoated" lens covers (i believe a.k.a. Neutral Density Glass Filters)? has anyone used them? Not quite. neutral density filters are gray, not clear. A MC Protection filter should be clear glass with no hint of a yellow, salmon, gray or any other color or tone. An example of one is the Heliopan SH-PMC Protection filter. UV, Skylight, Haze and ND filters are not clear glass protection filters. Although they can all be used as one. -- To reply no_ HPMarketing Corp. I use UV filters as protection for my front lens elements. Even though today's film emulsions are less-sensitive to UV, and the multicoating on lenses tends to absorb UV anyway, I have always felt that the use of a UV filter--as opposed to a plain Protection Filter--couldn't hurt. Is there any real advantage in using a clear glass (i.e., non-UV) filter? |
#18
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Thoughts on "Multicoated" lens filters
"D.M. Procida" wrote in message ... Dave wrote: should i buy "Multicoated" lens covers (i believe a.k.a. Neutral Density Glass Filters)? has anyone used them? And, if the miraculous (so people keep saying) Pentax SMC lenses have the best coatings, wouldn't Pentax filters (if indeed there are any such things) be the best? Daniele My Pentax filters are all UNCOATED. Go figure . . . I routinely use lens hoods and I typically avoid shooting directly into the sun. I've had no problems so far. |
#19
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Thoughts on "Multicoated" lens filters
In article ,
Tony Polson wrote: Dave wrote: The UV filter is the correct one to use. It has no colour cast whatsoever but has the added slight benefit of reducing UV transmission which affects both film and digital capture. Sorry but no. A UV filter is made from a slightly yellowish piece of glass. A protection filter is the one with no color in the glass. Some brands offer special thin rings specially designed for wide angle lenses. They often omit the front thread so you would not be able to add a second filter. But the thin ring is almost a guarantee of no vignetting. Heliopan only offers non-rotating filters like UV, protection, color correction, ND, etc. in thin rings with front threads. However a thin ring does not "almost guarantee" no vignetting. A thin mount or a thick mount both extend the length of the lens barrel and that is what can cause vignetting. To positvely, completely eliminate vignetting you need a thin step-up ring to a size at least 2 sizes larger in diameter then the screw-in filter and then use filters for that larger diameter. So if your lens uses 72mm filters you would use a step-up ring to at least 82mm. Then you will not vignette. If the focal length is extremely short then step up 3 sizes or more. -- To reply no_ HPMarketing Corp. |
#20
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Thoughts on "Multicoated" lens filters
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