## Matty W's recent activity

• Someone posted this formula: effective focal length (at minimum focus distance) = minimum focus distance [in mm!] / (maximum reproduction ratio + (1/(maximum reproduction ratio ))+2) It gets ...
• Way over my head, then, sorry. Maybe something like this would work: http://www.lightandmatter.org/2015/tech-photography-articles/how-to-calculate-a-lens-focal-length-slightly-simplified/ You could ...
• It seems you have your answer, even if it's hard to know the exact numbers. I assume there's a way of calculating something more precise from the minimum focusing distance and magnification figures. ...
• I imagine it's someone calculating field of view as they focus at different distances, using stars, which are always at infinity and can be measured in focus there–and also out of focus by looking ...
• I don't recall it being that bad with my 70-200mm f2.8 II IS, but I'm not shocked that there's a big difference between the three. I would have expected the Canon to breathe least and the Nikon to ...
• You can compare here: http://www.the-digital-picture.com/Reviews/ISO-12233-Sample-Crops.aspx?Lens=757&Camera=453&Sample=0&FLI=4&API=3&LensComp=856&CameraComp=736&SampleComp=0&FLIComp=4&APIComp=1 Lo ...
• Are you looking at FF or APS-C lenses? The Tamron is great, but much softer (and slower, obviously) on the long end than the wide, which is especially an issue on APS-C but I remember on my 5D Mark ...
• Replied in flare
I've actually already seen those links, but there's no A/B. Hmm. Might just need to rent and buy used.
• The 18-55mm IS II is really good in my experience. Check out the: 15-85mm IS USM and 18-135mm IS STM for more reach in either direction. 18-35mm f1.8 sigma for speed and sharpness. Or the 17-55mm ...
• Looks nice, especially given that it's at 10mm (though at f22, to be fair). Definitely a slightly different character to the sun stars on the Canon, however... maybe a result of the rounded ...
• Created discussion thread 10-18mm Canon vs 11-20mm Tokina
I love the sunstars on the 11-16mm Tokina, however the flare is awful so it's unusable for what I need. Too bad. The Canon looks better for flare, but has 7 aperture blades and not nine and they're ...
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 Total messages 206 Threads started 22 Last post 3 months ago
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