Question about Nikon DSLR D90 Digital Camera

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In the past when film was still king and I was using it I had always used a UV or a Polarized lens cover. Now in the DSLR world I've been told that I should not use a non rated DSLR lens cover. Is there something out there that I should know???? Rick

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I think what you are referring to is the difference between coated and non-coated UV filters. In the old days of film, simple UV filters were fine and reduced haze while protecting the lens glass. The newer and much more expensive multi-coated UV filters do the same thing, but are also said to protect against ghosting and flare in digital cameras and lenses, which tend to be more sensitive to that issue. I've used both on my DSLR, and the answer as to whether the more expensive coated UV filter is worth the money: it depends.

Posted on Nov 25, 2010

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Without specific reference to the D90, the following applies to almost all dSLR's: Skylight filters (UV) are fine, but avoid using auto white balance. Polarisers can prevent the autofocus system from working, but the more expensive circular polarisers are usually OK although don't produce quite the same effect as linear polarisers.

Posted on Oct 08, 2010

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I have just purchased polaroid lense filters polaroid say they are compatible with Nikon d90 but I cant get them on do I need something else to attach them


Filters must be the right size for each lens. For example the 18-105mm kit lens that comes with most D-90 kits uses a 67mm filter. They thread into the main lens. It is always safer to put a clear or UV filter on your camera lens to protect the expensive lens glass. You can thread another type of lens onto it as easily as you can your base lens. Be sure and do not force a threaded lens filter onto your lens or you will damage the expensive lens. It should thread on easily and do not over tighten it.

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I have a wonderful old sigma 79- 200 mm macro lens which i i used on a 35 mm film camera. I dont think i will ever be able to afford a digital setup with a lens like this so was wondering if i should get a...


What lens mount do you have on the lens? In other words, with what make film camera did you use the lens? A DSLR from the same company should be able to use the lens.

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Will the Quantaray 49mm to 55mm step up ring work on a Sony a100 DSLR camera


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Can you use the twist-barrell zoom lens on a Sony DSLR camera (or any DSLR) when the camera is set to auto-focus? I've been told that this damages the gears in the lens if you do. Thanks for your help.


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Cameras compatible with Quantaray AF 70-300mm lens


Depending on how new your Minolta SLR film camera was, the lens may or may not work on a Minolta Digital SLR. In many cases, a lens with the correct mount (in this case, a Minolta mount) can be used on the same brand of camera in the digital format.

One thing you should know is that DSLR sensors are, generally speaking, smaller than the size of a 35mm film negative. Long story short, that means that your lens will have a magnification factor on the DSLR. Usually, it is in the range of 150%, so a 70-300 lens from a film camera would cover 105 to 450 on a Digital SLR.

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Chip to lens


Sigma cannot rechip your old 70-200 2.8 call sigma uk and see what thay can offer on 01707329999

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2 Answers

Polarized lens


A polarized lens will work on a digital as well as it would on a film camera.

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1 Answer

Filter


Skylight filters don't generally block UV, they change the colour tint optically, which you can do without danger of image degredation in post-processing, so I woudn't really recommend using a skylight filter for digital cameras. I haven't tried a UV filter on my fz10, only my circular polarizer. From what I've heard however, a uv filter may act as lens protection (or use the lens hood), and might in some circumstances reduce haze (rarely), and there are unconfirmed rumours of possibly reducing purple fringing. If anyone could ever confirm this, I might consider one. Otherwise, UV filters also seem peripheral for digital photography. Probably the most important optical filter you can use is a polarizer. This can cut a lot of excess scattered/polarized light and reduce excess contrast, increase sky colour saturation, etc. It's effects are extremely difficult or impossible to get in editing.

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