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#1
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Hoya 67mm circular polarizer + Hoya Skylight + Nikon D70 - some problems
Hi All,
I recently purchased a Nikon D70 and I also bought a 67mm skylight filter and a "high quality" polarizer, both Hoya. I noticed when I use both together, the top corners of the image are very dark and I must crop the photo to a smaller size in order to avoid this. I want to ask if it is normal to have this effect when using both the skylight and the polarizer. Are there other filters which are better and can be used together? Is there any point in combining a skylighter and a polarizer (does the polarizer filter out the UV?) Regards, Nicolae |
#2
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In article ,
"Nicolae Fieraru" wrote: Hi All, I recently purchased a Nikon D70 and I also bought a 67mm skylight filter and a "high quality" polarizer, both Hoya. I noticed when I use both together, the top corners of the image are very dark and I must crop the photo to a smaller size in order to avoid this. I want to ask if it is normal to have this effect when using both the skylight and the polarizer. Are there other filters which are better and can be used together? Is there any point in combining a skylighter and a polarizer (does the polarizer filter out the UV?) Regards, Nicolae That's normal for some lenses. You'll need to start with a step-up ring before you can stack filters. Some very wide angle lenses need special filters to use even one of them. I wouldn't call Hoya high quality either. I've had problems with them being fogged in varying degrees. The worst looked like it was covered in soot. Hold it in the sunlight with your finger casting a shadow. A good polarizer shows a faint shadow or no shadow on the glass. Fogged polarizers show a definite shadow. I've also had the grease ooze out of Hoyas in wet weather. I have two Promaster filters and they're both good. Not sure if that's good luck or good quality. My first two Hoyas were good too. |
#3
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In article ,
"Nicolae Fieraru" wrote: Hi All, I recently purchased a Nikon D70 and I also bought a 67mm skylight filter and a "high quality" polarizer, both Hoya. I noticed when I use both together, the top corners of the image are very dark and I must crop the photo to a smaller size in order to avoid this. I want to ask if it is normal to have this effect when using both the skylight and the polarizer. Are there other filters which are better and can be used together? Is there any point in combining a skylighter and a polarizer (does the polarizer filter out the UV?) Regards, Nicolae That's normal for some lenses. You'll need to start with a step-up ring before you can stack filters. Some very wide angle lenses need special filters to use even one of them. I wouldn't call Hoya high quality either. I've had problems with them being fogged in varying degrees. The worst looked like it was covered in soot. Hold it in the sunlight with your finger casting a shadow. A good polarizer shows a faint shadow or no shadow on the glass. Fogged polarizers show a definite shadow. I've also had the grease ooze out of Hoyas in wet weather. I have two Promaster filters and they're both good. Not sure if that's good luck or good quality. My first two Hoyas were good too. |
#4
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Hi Kevin,
Thank you for the information provided. I did some more tests and I noticed the dark corners only appear under 30mm focal lenght. The lens I have are 24-70mm Thanks for telling me about the Promaster filters. Maybe in the future I will do something about this matter. The term "high quality" was written on both packs of Hoya filters. I checked for the shadow left by the polarizer, and it shows some shadow. It is arguable if is a faint shadow or a stronger one, as I can't compare it with other filters. Regards, Nicolae "Kevin McMurtrie" wrote in message ... In article , "Nicolae Fieraru" wrote: Hi All, I recently purchased a Nikon D70 and I also bought a 67mm skylight filter and a "high quality" polarizer, both Hoya. I noticed when I use both together, the top corners of the image are very dark and I must crop the photo to a smaller size in order to avoid this. I want to ask if it is normal to have this effect when using both the skylight and the polarizer. Are there other filters which are better and can be used together? Is there any point in combining a skylighter and a polarizer (does the polarizer filter out the UV?) Regards, Nicolae That's normal for some lenses. You'll need to start with a step-up ring before you can stack filters. Some very wide angle lenses need special filters to use even one of them. I wouldn't call Hoya high quality either. I've had problems with them being fogged in varying degrees. The worst looked like it was covered in soot. Hold it in the sunlight with your finger casting a shadow. A good polarizer shows a faint shadow or no shadow on the glass. Fogged polarizers show a definite shadow. I've also had the grease ooze out of Hoyas in wet weather. I have two Promaster filters and they're both good. Not sure if that's good luck or good quality. My first two Hoyas were good too. |
#5
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Nicolae Fieraru wrote:
: I did some more tests and I noticed the dark corners only appear under : 30mm focal lenght. The lens I have are 24-70mm : Thanks for telling me about the Promaster filters. Maybe in the future : I will do something about this matter. : The term "high quality" was written on both packs of Hoya filters. I : checked for the shadow left by the polarizer, and it shows some shadow. : It is arguable if is a faint shadow or a stronger one, as I can't : compare it with other filters. It sounds like you are getting vignetting. The lens field of view is wide enough that the edge of the filter edge ring is visible in the corners of the photo. This is the darker corners. Anytime you stack filters on a wide angle lens this is possible, and the more filters stacked on the lens the more likely the problem to crop up. As to the question of the need to use both filters (UV and pola) at the same time, yes and no. If you didn't have a vignet problem, I would say, go ahead and use both. I use my UV filter as a lens protector and leave it on all the time. This protection filter saves my lens from dust, and scratches. And if cleaning or inadvertant rough handling leaves scratch or other damage on the filter it can be replaced easy (unlike the front lens element in similar situation). So if you had no vignetting happening, leaving this protector in place ensures continued protection. But in your situation, it would be better to only use one filter at a time. Exchanging the filters will increase the chance of dirt or damage to the main lens durring the swap operation. And while the Pola filter does not normally filter out UV specifically, it does reduce it as it does with all wavelengths of light, thus reducing UV effects. One possible solution to the stacked filter problem is to get "thin" or "low profile" filters. They tend to be a bit more expensive and more delicate, and may be hard to find in some filter sizes. But it may be possible to get two filters that, when stacked, would be about the same thickness as the one filter you now have no problem with. Unfortunately there will be no guarantees that two thin filters will be thin enough until you have them in hand and try them. If you have access to a larger camera supply store that has these filters in stock, you may be able to try them out with your camera before buying. Randy ========== Randy Berbaum Champaign, IL |
#6
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Nicolae Fieraru wrote:
: I did some more tests and I noticed the dark corners only appear under : 30mm focal lenght. The lens I have are 24-70mm : Thanks for telling me about the Promaster filters. Maybe in the future : I will do something about this matter. : The term "high quality" was written on both packs of Hoya filters. I : checked for the shadow left by the polarizer, and it shows some shadow. : It is arguable if is a faint shadow or a stronger one, as I can't : compare it with other filters. It sounds like you are getting vignetting. The lens field of view is wide enough that the edge of the filter edge ring is visible in the corners of the photo. This is the darker corners. Anytime you stack filters on a wide angle lens this is possible, and the more filters stacked on the lens the more likely the problem to crop up. As to the question of the need to use both filters (UV and pola) at the same time, yes and no. If you didn't have a vignet problem, I would say, go ahead and use both. I use my UV filter as a lens protector and leave it on all the time. This protection filter saves my lens from dust, and scratches. And if cleaning or inadvertant rough handling leaves scratch or other damage on the filter it can be replaced easy (unlike the front lens element in similar situation). So if you had no vignetting happening, leaving this protector in place ensures continued protection. But in your situation, it would be better to only use one filter at a time. Exchanging the filters will increase the chance of dirt or damage to the main lens durring the swap operation. And while the Pola filter does not normally filter out UV specifically, it does reduce it as it does with all wavelengths of light, thus reducing UV effects. One possible solution to the stacked filter problem is to get "thin" or "low profile" filters. They tend to be a bit more expensive and more delicate, and may be hard to find in some filter sizes. But it may be possible to get two filters that, when stacked, would be about the same thickness as the one filter you now have no problem with. Unfortunately there will be no guarantees that two thin filters will be thin enough until you have them in hand and try them. If you have access to a larger camera supply store that has these filters in stock, you may be able to try them out with your camera before buying. Randy ========== Randy Berbaum Champaign, IL |
#7
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Nicolae.
There is no need for you to combine those filters. The combination is causing vignetting. As a rule, the less glass between you and your subject, the better. If you feel it is absolutely necessary to have a UV or Skylight filter for the physical protection of your lens, go ahead and use it. For critical photography, you should remove it. When using a polarizer filter, you should avoid using any other filter along with it. A final word of advice: use the very best quality filters you can afford. Rob |
#8
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Nicolae.
There is no need for you to combine those filters. The combination is causing vignetting. As a rule, the less glass between you and your subject, the better. If you feel it is absolutely necessary to have a UV or Skylight filter for the physical protection of your lens, go ahead and use it. For critical photography, you should remove it. When using a polarizer filter, you should avoid using any other filter along with it. A final word of advice: use the very best quality filters you can afford. Rob |
#9
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In article R4R5e.939735$6l.624849@pd7tw2no,
"Basic Wedge" wrote: When using a polarizer filter, you should avoid using any other filter along with it While there is no reason to use a UV with a polarizer some people do like to use a skylight filter with a polarizer to add some extra warmth to the scene. -- To reply no_ HPMarketing Corp. |
#10
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In article R4R5e.939735$6l.624849@pd7tw2no,
"Basic Wedge" wrote: When using a polarizer filter, you should avoid using any other filter along with it While there is no reason to use a UV with a polarizer some people do like to use a skylight filter with a polarizer to add some extra warmth to the scene. -- To reply no_ HPMarketing Corp. |
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