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DPChallenge Forums >> Hardware and Software >> D70 Woes - Vignetting on everything!
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Showing posts 1 - 22 of 22, (reverse)
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 08/22/2004 04:55:18 PM · #1
Wow,
I was so terribly excited that I finally got a D70, picked a Sigma 18-135 SLD DC Lens for a good range of coverage with decent glass and look at my pictures thinking why did I buy this? A day at the beach resulted in close to 100 shots with vignetting in all four corners, wide and zoom, mostly higher shutter speeds, and I'm thinking 'Why did I buy this again?'. Someone please give me hope...do I have to correct every shot I take? Do I only get to use 2.8 lenses to get decent shots? Is the moon just in the wrong place this month? Help.

Todd

Sorry, forgot to include examples. Hope these help. The volleyball one is the shortest focal length with the others ranging through the lens capability. They have all been color corrected only, no other modifications or cropping (other than the save for web in PS).

Thanks again for anyone's help...



Message edited by author 2004-08-22 17:54:04.
 08/22/2004 04:57:17 PM · #2
Post some examples.
 08/22/2004 05:05:32 PM · #3
seems contrary to what i have seen and heard from the d70...

try another lense if you have one. maybe thats the problem.

08/22/2004 05:06:00 PM · #4
I agree
 08/22/2004 05:11:23 PM · #5
were you using a polarizer?
 08/22/2004 05:12:00 PM · #6
No troubles here

I use the kit Nikkor lens AF-S DX 18-70mm F3.5-4.5 IF ED
And the Nikkor AF-D ED 70-300mm F4-5.6D

I am also looking into a Sigma macro. The sales guy at the shop said to bring in my camera a give any Sigma̢۪s a REALLY good try before buying one. Something about some minor quality control issues....Maybe it̢۪s the lens...sorry but I don̢۪t know how you could verify it

08/22/2004 05:50:01 PM · #7
Added photo links to original post. Thanks everyone ahead of time for all the suggestions.

Todd

Message edited by author 2004-08-22 17:55:00.
 08/22/2004 06:06:51 PM · #8
Originally posted by DarkRider:
No troubles here

I use the kit Nikkor lens AF-S DX 18-70mm F3.5-4.5 IF ED
And the Nikkor AF-D ED 70-300mm F4-5.6D

I am also looking into a Sigma macro. The sales guy at the shop said to bring in my camera a give any Sigma̢۪s a REALLY good try before buying one. Something about some minor quality control issues....Maybe it̢۪s the lens...sorry but I don̢۪t know how you could verify it


I recently got a 105mm sigma macro lens for my D70, and it works like a charm.
 08/22/2004 06:07:40 PM · #9
Do you have another lens to try?
Is the sigma the new one built for dslrs?
Are there other filters and or a lens shade on the lens that could be blocking the light a bit around the outside?
 08/22/2004 06:09:43 PM · #10
Looks to me like it is most likely a filter (UV, Polarizing, etc.) on the front of the lens that is maybe doing this. Strange!!!
 08/22/2004 06:16:56 PM · #11
That's why I asked if it was the one built for dslrs. With the ones built for 35mm cameras, there is a pretty large area of non-use on the perimeter of the lens unless you're using a wide angle one. But if it was built for digital, that area would be reduced and one would have to be careful to not build up the height to much. At least that's what I'm thinking. Could be wrong. Wouldn't be the first time.
 08/22/2004 06:26:46 PM · #12
Strange though that the vignetting is constant across the focal range. You would not expect that if the problem was an obstruction like a lens hood or filter.
I'm wondering if we're seeing the edge of the image circle, since the D70 is a 1.5x crop camera as opposed to the 1.6x crop of the Canon 10D, 20D, 300D.

Message edited by author 2004-08-22 18:28:29.
 08/22/2004 06:30:22 PM · #13
That vignetting looks pretty similar on all these images. If they were all shot at varying focal lengths, I would say that it's an issue with the lens itself. If you had filters installed, I would try some test shots without the filters. If you were using a lens hood, I would try some test shots without the lens hood.

I would also try a couple tests at both ends of the aperture range and see if there is any difference...


08/22/2004 06:35:25 PM · #14
I like the photos you have posted
08/22/2004 07:15:40 PM · #15
Questions and answers:

Filter, yes one Kenko UV to protect the lens. I can try taking it off. It seems to vignette less at wide but is still visible. The amount of vignetting appears constant.

Lens, DC, built for digital cameras with APS-C chip format. Nikon format. I cannot find any data that says specifically that the Nikon chip is APS-C format. PERHAPS the local store where I bought it will exchange it for a different make or at least a NON-DC Sigma. Yes it is the brand new (May) 18-135 for a 28-205+/- range. I really like the range but it would be a drag to have to fix every single (okay 90%) photo.

I will take some test shots and post.

Todd
 08/22/2004 07:19:27 PM · #16
do you have the kit lense?

what you have posted looks pretty substantial - if it were a common thing - even for the specific lense - i doubt you'd be the 1st to mention it.

something is wrong somewhere.


08/22/2004 08:03:19 PM · #17
OK,
No, I don't have the kit lens. Here's some data.

At 18mm (28), vignetting is present up until f16. This 'could' be reflective of high shutter speeds but pretty much renders it useless outside for shallow DOF.

At 90 mm (135), vignetting is pretty much gone between f11 and f13, maybe f14.

I do have the updated firmware on board to correct for the vignetting that supposedly occurs at high shutter speeds with continuous AF on.

Appears to be a bigger issue outside or in bright light.

'Must control hammer of doom.'

Todd
 08/22/2004 08:24:08 PM · #18
The fact that you are using a lens designed for "digital cameras with APS-C format" leads me to believe that this may be a result of the lens.

A normal 35mm lens (not one designed for the APS-sized sensor used in Nikon DSLR's) has a much larger imaging circle, so even if you would get vignetting from stacking multiple filters on a 35mm film camera, using that same setup on a DSLR will be no problem whatsoever.

However, a lens designed specifically for the APS-sized sensor means that it generates a smaller imaging circle, and would be susceptible to such vignetting. Back in the film-only days, vignetting was a common problem with cheaper zooms and wide-angle lenses. Those same lenses, used on a DSLR, will have no vignetting because the sensor is only using a portion of the imaging circle.

I would suggest trying a different lens and most likely the problem will go away. If it does, then it is another thing to be aware of when buying less expensive glass that is designed specifically for small imaging sensors.
 08/22/2004 08:36:47 PM · #19
It is a lens issue, take it back to the store.
 08/22/2004 08:54:15 PM · #20
A D70 owner myself, any vignetting I have experienced with the camera is rare and barely perceptible; nothing compared to yours. I have the kit lens, and two Sigma zooms (28-80mm and 70-300mm) that came as a set. I would agree with the others in saying try a new lens.
 08/22/2004 09:04:40 PM · #21
Vignetting is from lens not Body... execpt for cheep lenss on 1.6x sensor...

Never ever by a lens before checking fredmiranda.com review and chasseur d'image (french magazine) that test every lens (over 200$) with rebel, 10d, 1dmark2 1ds, d70, 1dx..... and give review and score base on numbers generated fom dxo bench.... that best software that exist (dxo.com)...

I have read tons of magazine... and more bookmark.... and that just before buying anything research more that 2 month about 1 hour per day !...... now i know what i buy....

Dont expect anything perfect fom a huge zoom range and below 1000$ lens.. !

Just my opinion ! :-)
 08/24/2004 01:15:07 AM · #22
Thanks to all and follow up. Took lens back and tried dupe, same problem...DC lens. Tried original (kit) lens, better but actually saw the image circle in one corner at 18mm. Received a lecture on the difference between lens fall off (lightwise) and actual vignetting where you see the ring. Okay, I learned something. Limited stock on hand produced a Sigma 28-105/2.8-4 lens for about $80 less than the other one and the picture is majorly better. A lot of people gave it a middle of the road grade but for a carry around lens that doesn't cost me more than the camera I guess it will work. Still don't quite see the difference between my S7000 and the Nikon photo wise but I suppose I will learn. Thanks to everyone who helped out with this.

V/R

Todd
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