 Martin Baadsgaard |
Close-up Problems with 70-300mm lense Hey guys. I have just bought this package of 3 close-up filters. They work quite nicely, except for when I zoom in to above 150mm. Then the image gets all blurred. not like if you focus a bit in front of or behind the subject, or like camera shaking when snapping a picture. It looks like the lense is REALLY greased, so it's kinda sharp but there's an "aura" around everything, like a layer of out-of-focus has been added on top. I see this not just on the pictures taken, but also when just looking in the viewfinder (so it's not a depth of field error as result of too low f-stop I guess). Anyone got an idea about what's wrong here? The lense/filters aren't dirty, I can assure you. and the error doesn't occur when zoomed out to 70mm. It is also not depending on the number of filters mounted. Hope you can help me here. I would really hate it if the filters/the lense I have just turned out to be crap (sorry for the language there...) The filters are 62mm Soligor, and the lense is a Nikkor DX 70-300mm F/4-5.6
|
|||||||
|
|
||||||||
- Gregory LaGrange Contact Gregory LaGrange Gregory LaGrange's Gallery |
crap when above 150. Now you see why macro lenses cost so much more than regular lenses.
|
|||||||
|
|
||||||||
|
Martin Baadsgaard |
Well, that doesn't help me much. I've seen pictures, perfectly sharp, taken with close-up filters at 170mm, so how come this isn't going so well for me??
|
|||||||
|
|
||||||||
|
Jon Close |
I don't know for certain, but would guess the Soligor close-up lenses are inexpensive single element designs. These are not well corrected for chromatic aberration (different wavelengths/colors focusing to different distances) and will give the "greased" effect you describe. Better would be an achromat close-up lens with a 2 element construction, such as Canon's 250D (+4 diopters) and 500D (+2 diopters), or Nikon's 5T (+1.5 diopters) and 6T (+2.9 diopters). Secondly, the Nikon 70-300 f/4-5.6, like most zooms of that class, is best from 70mm to about 150mm or 200mm and sharpness falls off when zoomed beyond that.
|
|||||||
|
|
||||||||
|
Martin Baadsgaard |
Sounds quite right. Same problem when using the lenses with my dads Tokina 70-210mm which is a pretty ok quality (as far as I know...). So get a Soligor pro filter would be the "solution" here?? (They are double element achromatic lenses, but they're quite expensive).
|
|||||||
|
|
||||||||
|
Martin Baadsgaard |
At last got some test pictures onto my computer. They do not show a "color sepctrum offset" as you would expect from chromatic aberration (which I found in some pictures of yellow flowers of mine), and the problem doesn't appear with my dads 70-210mm f/3.5 Tokina as I say above.
|
|||||||
|
|
||||||||
|
Martin Baadsgaard |
At last got some test pictures onto my computer. They do not show a "color sepctrum offset" as you would expect from chromatic aberration (which I found in some pictures of yellow flowers of mine), and the problem doesn't appear with my dads 70-210mm f/3.5 Tokina as I say above.
|
|||||||
|
|
||||||||
|
Martin Baadsgaard |
This website got some problems with editing a profile while posting pictures. And a correction to the above: The problem DOES appear with my dads 70-210mm lense, so it is not a lense error I guess. Anyway, here are the pictures
|
|||||||
|
|
||||||||
|
Bob Cammarata |
Close-up filters have a narrow field of corner-to-corner sharpness and so do some zooms. Looks like you are getting a compounded effect from both deficiencies.
|
|||||||
|
|
||||||||
|
Martin Baadsgaard |
So a better filter wouldn't help here? And what about a better lense? (not that I'm gonna go buy one, cause then I might have to pay more for a new lense than I did for my whole camera kit).
|
|||||||
|
|
||||||||
|
Bob Cammarata |
A good used manual-focus macro lens...even a Nikkor, won't cost you that much and your close-up work will improve dramatically! As a side note,...if your lenses cost more than your camera, that's not always a bad thing. ;)
|
|||||||
|
|
||||||||
|
Martin Baadsgaard |
Well, my dads costs 5000kr (danish kroner) from new, and I payed 10000kr for my kit (D70 with 2 lenses), so a good tele with AF, VR maybe, and of a nice quality could go up to about 7 maybe 8000kr I guess... Anyway thanks for the optimism there Bob ;) I'm not done with close-up yet.. at all... This is fun :D
|
|||||||
|
|
||||||||
|
Isidoro |
I had the same problem with my 70-300 and close-up filters. I tried several mark´s (hama, B+W) with the same result. I would like to try with an achromatic close-up lens (canon 250d), but I don´t venture because in the shops have to order it and it´s very expensive to be unsuccessful.
|
|||||||
|
|
||||||||
|
Nam Le |
this is old thread , but I will still have my response . The blurry layer you were talking about is like glow effect , right? for cheap filter , close your aperture around f 8.0 . Try .
|
|||||||
|
|
||||||||
|
This old forum is now archived. Use improved Forum here
Report this Thread |
||||||||