What was I doing wrong?

Zaf

Zaf

Zaf

Soldato
Joined
16 Jan 2003
Posts
6,958
Location
Derbyshire
Hi Guys,

Went up Snowdon last Saturday the aim was to be up and down within 4 Hours (some guys I went with did it in 3 :eek:) so I didn't have much time to stop and take photos (mess around with camera settings etc)

Most of the photos I did take though... Actually I better tell you my Camera first, I've just got a Canon 500D with the 18-55mm IS Kit Lens

...Back to my point, at the Lenses widest I've got horrible circular blurs in the corners of my photos, I'm guessing this has something to do with light not getting to the sensor or something (I'm a complete newbie)

Any advise so I don't end up with this again or could it be a faulty lens!?

Examples

snowdon0021.jpg


snowdon0020.jpg


snowdon0036.jpg


snowdon0084.jpg


Cheers
Zaf,
 
Did you have the lens hood attached correctly? that is pretty serious vignetting there
 
I dont have a Lens hood!!

I do have a 7Dayshop UV Filter attached though, would have thought it would be that close to the lens it wouldn't get in the way :confused:
 
I only put it on to protect the lens nothing more! But if I buy a £20 Canon one you're saying the fall off will go away?

Isn't it the fitting of the fillter creating the fall off though not the glass, would have thought 7Dayshop filter would be the exact same dimensions as a Canon one just lower quality glass (plastic?)

So much to learn hehe
 
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Zaf said:
I only put it on to protect the lens nothing more! But if I buy a £20 Canon one you're saying the fall off will go away?

Isn't it the fittinging of the fillter creating the fall off though not the glass, would have thought 7Dayshop filter would be the exact same dimensions as a Canon one just lower quality glass (plastic?)

So much to learn hehe
Click to expand...

I've not used a UV filter as its not needed on a Digital SLR but haven't had any of that when using a CP filter on kit lens with a 450D at its widest setting. :confused:
 
I was there on the weekend too, took 3 hours to get to the top via Llanderis route on our bikes (few not so fit riders with us so plenty of stops).






25 minutes to come down Rangers, :D
 
I had exactly that effect when I stacked a uv filter on top of a cp filter - it's the filer extending too far from the end of the lens and being caught in the frame.
 
nutsnut said:
I was there on the weekend too, took 3 hours to get to the top via Llanderis route on our bikes (few not so fit riders with us so plenty of stops).






25 minutes to come down Rangers, :D
Click to expand...

Sounds Awesome! I'm in training for the National Three Peak Challenge next june so should hopefully be getting some better pics from The Ben and Scafell :)
 
Zaf said:
I dont have a Lens hood!!

I do have a 7Dayshop UV Filter attached though, would have thought it would be that close to the lens it wouldn't get in the way :confused:
Click to expand...

Bingo, that was my first thought when I saw the photos, that flare in the second photo is probably caused by it as well.

robmiller said:
A pointless, cheapo UV filter causing light falloff in the corners? Well I never!

Take it off and use it as a drinks mat.
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What he said.^^:)

I also went up on Saturday, no wonder it was so ****** packed!:p:(
 
We ended up getting there around 11am...

Parked down the road near the bus stop. I love that cafe though, they sell actual Slush Puppies, Rasberry flavoured as well!!
 
You need a filter with a slim mount to avoid this and they tend to be the more expensive ones that are actually worth having. The cheap ones may protect your lens but not your photo's.
 
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Definately the UV filter.. I get the same vignetting if I go wide angle with my cheapo polarizing filter. Take it off :)
 
Snapshot said:
You need a filter with a slim mount to avoid this and they tend to be the more expensive ones that are actually worth having. The cheap ones may protect your lens but not your photo's.
Click to expand...

Eggzakkery - if you're going to stack glass on glass then you should put quality on - if only to stop light bounce between elements - it's the main cause of bad lens flare.
 
Cheers Guys Lens hood is on order :)

Now I need to figure out which Lens I would most use next to buy and which Canon Printer
 
As others have already mentioned, it is likely to be the filter fitted to your camera.

I wouldn't bother having it on the lens whilst taking pictures since a UV filter isn't needed with digital sensors. Back in the day when film was all the rage it was sensitive to UV light and hence could have a colour cast in certain circumstances. Best practice was to fit a Skylight or UV filter to take out this cast.

Digital cameras don't have this problem, so the only use of a UV filter really is to protect the front element of the lens. Take it off whilst taking pictures and pop it back on when you've finished using the lens - it will keep horrible greasy finger marks and dust off it.

As for your problem, Vignetting can sometimes be desirable, however in the main it can be quite distracting.

Your Canon 500D has a facility called Peripheral Illumination, which can be accessed via the menu of the camera. Page 100 of the Manual for the 500D shows how you can enable this facility. Very simply it lightens the corners of the shot, since with wide angle lenses you can sometimes get Vignetting when set to the widest angle in any event. I believe you can enable or disable it for each individual lens.

The Digital Photo Professional Software that came with your camera also allows you to alter the Peripheral Illumination as well.

That said in your case the best way to remove it would be to get rid of that filter.

Hope this helps.
 
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