Tag: lens

27 Nov

A fairy’s light source – a critique for @PeteGlogiewicz

Chris Lane / Critique, photography / / 0 Comments

Pete (on twitter here) recently sent me a photo for critique in a project style that he has never done before. Here is the photo:

Pete's original photo

Issues in the metadata

Here is the metadata from the image: 255Kb (in the original that he posted on his website), shot on a Canon 400D/XTi with an EF28-80mm f/3.5-5.6 USM lens. It was shot at ISO 200, f/11 and 1/80th of a second. The focal length was 28mm.

In the metadata I can see a couple things generally wrong with this. First, the size of his file. This is minor, but I know for an image that is only 900px wide, he should be able to compress that file down a lot more without any issues. If he is using Photoshop, he should be using the Save for Web function instead of the Save As function. The file sizes will be dramatically smaller. This isn’t an issue with the photo itself of course, but in the scheme of things it is important. If he wants his website found, Google does use page load speed as one of it’s parameters for search results.

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21 Aug

Is your UV filter screwing up your photos?

Chris Lane / Camera parts, photography, review / / 4 Comments

I recently watched a little video from Kent Weakley about the dangers of using UV filters on your lenses. This is common practice by many photographers for a variety of reasons. It was done partially back in film days because of damage UV rays could do to the film itself. Now I think it is primarily to protect the lens from scratches, bumps, etc. He didn’t seem to go into absolutes on what exactly the effect to your photos would be, so I went ahead and tested it. I took a variety of photos on a 50mm 1.8 Canon lens with a Tiffen UV Protection Filter on a Canon 40D in different situations, with the exact same settings once with the UV filter and once without. This way I could see whether the color, light level, or anything else was affected. I decided to also test my ND filters to see what happened with those. In that case, since ND filters specifically reduce the amount of light into the camera, I only adjusted the shutter speed to compensate. Also, I made sure to clean my lens and filters thoroughly before the experiment. These are my results:
First up, my granary. Shot at ISO 200 1/250 f/3.5
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22 Jun

Insect Macro Fun!

Chris Lane / photography / / 4 Comments

Here are a few photos of some insects I took with my new Tamron 70-300mm f/4 Macro Lens. So far I am really liking this lens. It could be faster, like f/2.8 would be great, but was definitely within my budget too. Just to warn you, these images will get really up close and personal with some pretty nasty bugs. And if you don’t like spiders, don’t go all the way to the end!
And on to the photos. (and just to say, some of these are available for prints, if you were really into bugs!)

Mosquito Hawk © Chris Lane Photo

June Bug © Chris Lane Photo

Phyllophaga aka June bug © Chris Lane Photo

Green Insect © Chris Lane Photo

House Fly © Chris Lane Photo

Weevil Larvae © Chris Lane Photo

yellow jacket wasp © Chris Lane Photo

white moth © Chris Lane Photo

spider shell © Chris Lane Photo

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05 Aug

Aperture on Cameras pt. 2

Chris Lane / Camera parts, Training / / 1 Comment

Used to be…

Minolta X-700 with lens
Older SLR (single lens reflex) cameras, pre-digital info screen, had aperture adjustment on the lens itself. The image shows an example from my Minolta X-700 with a 50mm f/1.7 lens, made in 1983. This camera does, however, have a full auto setting, so that it can adjust the aperture for you. Unfortunately, you cannot tell what it is adjusting to without the digital screen that the somewhat more modern film Canon Rebels had.
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