Using non IS canon Lenses

Discussion in 'Photography Equipment & Products' started by just x joey, Jan 21, 2007.

  1. just x joey

    just x joey TPF Noob!

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    can u shoot handheld and get good shots with a non IS lens? like the canon 85mm 1.8 and the sigma 17-70mm f/2.8-4.5 DC. i need to know, because i shoot mostly handheld, like skateboarders, bands, and stuff, and im going to be buying these 2 lenses and a 30d body soon, thank you.
     
  2. Peanuts

    Peanuts TPF Noob!

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    Do remember that 'back in the day' there was no IS - so yes it is very possible. The IS essentially gives you that extra stop, stop and a half, ofprotection from ahnd shake. The lenses you listed are both very fast (at least the 85mm is. The sigma is slower on the longer end) It all really depends on your lighting situation.
     
  3. just x joey

    just x joey TPF Noob!

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    hm, well i shoot nice with a canon FTB that doesnt even have autofocus, so i suppose ill be fine? i will probably be shooting in low light conditions... with only the built in flash until i can save up enough for the 430ex.
     
  4. Peanuts

    Peanuts TPF Noob!

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    If you can get results on your FTB it won't be any different with the 30D other than you can review your results instantly.
     
  5. just x joey

    just x joey TPF Noob!

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    rad, thank you!
     
  6. Peanuts

    Peanuts TPF Noob!

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    I never used film for a long period of time so I am certain someone else can help you more in this area - but the primary difference (other than instant feedback) is the latitude of the two mediums. Film has a significantly wider latitude then digital, therefore it is easier to blow out highlights. Otherwise, it is pretty similar.
     
  7. Sw1tchFX

    Sw1tchFX TPF Noob!

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    Just wrap you strap around your arms, keep your elbows in, and stand firm and you'll be ok.
     
  8. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    The rule of thumb for handheld shooting of 35mm film is that you want your shutter speed to be faster than the reciprocal of the focal length. So at 85mm you will want the shutter speed to be at least 1/85 (1/90).

    Now with these digital SLR cameras with sensors smaller than 35mm film...they say that you should use the crop factor for this rule as well...so for a 30D, the factor is 1.6...so for handheld shooting with an 85mm lens, you will want to use a shutter speed of at least 1/136.

    With a maximum aperture of F1.8...the 85mm should have little problem getting good shutter speeds in decent light. This is where slower lenses are not very good. A lens with a maximum aperture of F5.6...will really struggle to give you fast shutter speeds.

    That why I recommend the 17-50 F2.8 over the 17-70 F2.8-4.5...because when shooting at 70mm, you will want a shutter speed of 1/112...which will be harder to get at F4.5 than at F2.8.


    The advantage of IS is that it allows you to use a slower shutter speed that you would without it...and still get sharper images. I believe that the specs say that older IS lenses will give you 2 to three stops and the newer IS lenses will give you 3 to 4 stops. So that means that, at say 85mm...with IS, you could expect to get sharp handheld shots at 1/20.

    Of course, this is all a rule of thumb...some people are steadier than others...and some people have better technique than others.
     
  9. just x joey

    just x joey TPF Noob!

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    wow, lol thanks mike, i had no idea about all that math :lol: i just guessd what would look good (guess shutter speed, fstop, and iso) and the pics usually come out nice, now that i know about math... hmmm it sucks its not the same for film as it is for digital otherwise, man the math wuld be easier. so how exactly do u get to 1/136 sec sutter speed from 85mm, what do u do? divide 1.6 by 85? ahh toobad the 30d dont come with a calculator built in :)
     
  10. I disagree, the crop factor should not be an issue in this particular calculation. The fact that you're losing some of the image along the edge does not affect the amount of glass the light has to travel through to create an exposure.

    But to give my two cents to the question: you can absolutely shoot hand-held. Crank you're ISO up little, shoot fast and wide, and you'll get some great shots.
     
  11. just x joey

    just x joey TPF Noob!

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    so the crop isnt a factor??? phew that makes the math ALOT easier haha
     
  12. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    I have a hard time with this one. To me, it seems as though the crop factor should not be an issue with the shutter speed rule...but I got blasted when I tried to argue that point on Photo.net. They say that since the sensor is smaller, any blurriness due to movement is enlarged. I'm still not 100% on the logic of it...but one thing is for certain...a faster shutter speed is always better to reduce the effects of camera shake.
     

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techniques in using non-is lense handheld