Error message

  • The specified file temporary://fileg4AgOq could not be copied, because the destination directory is not properly configured. This may be caused by a problem with file or directory permissions. More information is available in the system log.
  • The specified file temporary://fileWNME8J could not be copied, because the destination directory is not properly configured. This may be caused by a problem with file or directory permissions. More information is available in the system log.
  • The specified file temporary://fileESz8B3 could not be copied, because the destination directory is not properly configured. This may be caused by a problem with file or directory permissions. More information is available in the system log.

Lenses and Ghosting: Filters and Lens Hoods

Submitted by maz on Wed, 01/05/2011 - 13:57

I was slightly worried after taking some pictures with my Canon 70-300mm f/4.5-5.6 IS USM lens: there was some blurring which really should not have been there.

[[{"type":"media","view_mode":"media_large","fid":"4089","attributes":{"class":"media-image size-full wp-image-1269116974","typeof":"foaf:Image","style":"","width":"618","height":"572","alt":""}}]]

Vertical Blurring on Image

This isn't something I've seen on this lens, but I've not done any photography with it fully out at 300mm recently. I began to wonder if it was the cold weather, or perhaps it had been damaged somehow in transport? It didn't get any better with exposure or aperture, was still present when taking pictures using a tripod, and didn't appear to be a function of whether image stabilisation was on or off or in vertical mode.

[[{"type":"media","view_mode":"media_large","fid":"4085","attributes":{"class":"media-image size-full wp-image-1269116973","typeof":"foaf:Image","style":"","width":"707","height":"449","alt":""}}]]

70-300mm IS USM Lens at 300mm with UV Filter (100% crop)

On a hunch I decided to remove the UV filter screwed to the front.

[[{"type":"media","view_mode":"media_large","fid":"4077","attributes":{"class":"media-image size-full wp-image-1269116971","typeof":"foaf:Image","style":"","width":"707","height":"449","alt":""}}]]

70-300mm IS USM Lens at 300mm with no filter (100% crop)

...and extending the lens hood again...

[[{"type":"media","view_mode":"media_large","fid":"4081","attributes":{"class":"media-image size-full wp-image-1269116972","typeof":"foaf:Image","style":"","width":"707","height":"449","alt":""}}]]

70-300mm IS USM Lens at 300mm with Lens Hood (100% crop)

Conclusion: some UV filters just aren't up to it.

Tag:

Category: