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New APS-C Compact from Sony?

Discussion in 'Digital Photography' started by eddiewood, Feb 21, 2012.

  1. shotokan101

    shotokan101 Well-Known Member

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    Err - wasn't particularly thinking about it - you seen one on TP ?

    BTW - managed to prove to myself that it's my technique that's the problem with the siggie F4 :facepalm:

    [​IMG]

    Also - what I meant was that I'd be happy with better third party support for E-Mount ;)

    JIm
  2. Johnmcl7

    Johnmcl7 Active Member

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    I can't see any non-technical reason why Sony wouldn't produce pancake lenses, it's the real achilles heal of the system and seems to be the trade-off from their very small bodies. Sigma's two attempts at producing compact lenses for E-mount are pretty terrible as the lenses are bulky and slow.

    John
  3. eddiewood

    eddiewood Active Member

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    lol!
  4. twist

    twist Active Member

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    Dont think anyone in their right mind would spend 11k on that lens in the first place when you can get an alt for far less. And then sell it for a huge loss even if they were that stupid.

    Is that a crop Jim?
  5. godsakes

    godsakes Member

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    I tend to agree, it's more of a marketing tool for sony than anything else i.e. the equivalent of nations having nuclear weapons to say they're in the big boys club. There might more scope for it in the future if sony releases more sport orientated FF bodies.
  6. eddiewood

    eddiewood Active Member

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    Except the development time for a nuclear weapon is shorter. :D
  7. godsakes

    godsakes Member

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    +1 :rotfl:
  8. shotokan101

    shotokan101 Well-Known Member

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    Yes - 100% crop - pretty much straight from camera and cropped in LR - idea was to compare with the 70-300mm G TBH but "operator error" put paid to that :facepalm::blush:
  9. twist

    twist Active Member

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    Looks good for a 100% crop mate.
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  10. shotokan101

    shotokan101 Well-Known Member

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    Thanks - I thought so too - the 70-300 shots just didn't compare - but the again they were all shot handheld at 1/25th :blush: :suicide:
  11. twist

    twist Active Member

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    Jim Jim Jim, how many times, shutter speed needs to generally be equal to focal length when handheld, with Sonys IS a bit lower.
  12. shotokan101

    shotokan101 Well-Known Member

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    LOL - I know that - you obviously missed the "opeator error" part :D

    ...I had previously been shooting some pet shots in low light with the 17-70 using auto ISO and 1/25th sec in shutter priority and didn't notice I had knocked the dial back to shutter priority when I changed the lenses over :blush:
  13. topgazza

    topgazza Active Member

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    Humour me ....I've read this many times. Practical examples for my simple mind please :facepalm:
  14. twist

    twist Active Member

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    In the viewfinder youll see 1/???, thats your shutter speed. If you have a 300mm lens set at 300mm your shutter speed should be about 1/320, if its set at 200mm it should be 1/200, this gives a pretty good shutter speed for handholding, using a tripod you can go lower.
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  15. topgazza

    topgazza Active Member

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    In my viewfinder I see the woman next door in the shower......
  16. Johnmcl7

    Johnmcl7 Active Member

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    Just a small addition to this, you need to go by equivalent focal length so the above all applies on a full frame camera but for a crop camera you would need to go by 1 over the equivalent focal length. It's only a rough rule though particularly with any form of stabilisation which depending on how effective it is can drop a few stops below.

    John
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  17. topgazza

    topgazza Active Member

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    How do you mean "1 over the equiv focal length" John ? I'll have a play around anyway...so thanks guys. Always a place to learn things.

    Anyway, she's pulled the blind down..... its a tough game this photography lark
  18. twist

    twist Active Member

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    Good mention John. Basically, 1 thumb click past 1/300 for 300mm. So 160mm isnt 1/160 its 1/200.
  19. Johnmcl7

    Johnmcl7 Active Member

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    The 35mm equivalent view so if you have a 300mm lens on the A580, the equivalent focal length is 480mm so without IS you're aiming for around 1/500 shutter speed. The reason for this is that you're really going by the field of view rather than the focal length, a very wide field of view such as on an ultrawide lens is only going to need a relatively low shutter speed as the it will be easy to keep the view stable whereas a very narrow field of view on a super telephoto lens is going to need a very high shutter speed as there's going to be a lot of movement when trying to hold the camera steady.

    So if you think 50mm on a full frame camera is then quite a bit narrower on APS-C at around 80mm equivalent, on micro 4/3 or 4/3 is going to be narrower yet at 100mm and on a compact camera with a very small sensor it's going to be a decent telephoto length and need a much higher shutter speed. However as lenses are rarely specified by their field of view it's clearly simpler to use the focal length and then adjust it to the equivalent focal length for sensors smaller than 35mm.

    Most auto-iso or auto-exposures will attempt to maintain one over the (equivalent) focal length so while it's only a rough indicator it generally works reasonably well in practice.

    I do find it difficult changing between cameras with IS onboard and those without, with the Olympus cameras I got very used to the slower shutter speeds I could get away with thanks to the onboard IS so when I initially switched to the Panasonic micro 4/3 and Nikon F mount which don't offer IS in every lens I initially had quite a few blurry photos until I readjusted in my head the right shutter speeds to be using.

    John
    Last edited: Feb 22, 2012
  20. topgazza

    topgazza Active Member

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    Get it...:thumbsup:

    ...as I said...a place to come and learn. Appreciate this sort of advice as its in plain English. I might never buy a camera magazine again :thumbsup:
  21. shotokan101

    shotokan101 Well-Known Member

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    yeah - just take Twists example and multiply your lens focal length by the crop factor - usually about 1.5 :)
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  22. eddiewood

    eddiewood Active Member

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    Or just shoot with the highest shutter speed you can. :rotfl:
  23. topgazza

    topgazza Active Member

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    Theres always one who wants to take a shortcut....which is usually me to be fair :eek:

    I would normally do that especially as my 16-105 doesn't have IS so I'll be using the A580's inbuilt IS. Light permitting I would instictrivly use a fast shutter speed. But I'm always game to try things as it may just help me learn a bit more about how things work a bit more and where they came from. Also what I can and can't do with these devices.....

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