Knockoffs....

Discussion in 'Photography Beginners' Forum' started by SushiWarrior, Jan 14, 2010.

  1. SushiWarrior

    SushiWarrior TPF Noob!

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    Is there any harm in buying a knockoff speedlight? I don't have the $100+ for a genuine Nikon speedlight and I am noticing some cheap ($30) speedlight knock-offs for sale. What would I be loosing versus buying a genuine speedlight?

    1. Would it not be as controllable (it is TTL)?
    2. Would the light be off white (it lists it as 5600K, but I doubt that :p)?
    3. Would it eat lots of battery life?
    4. Would it not be as bright?

    Also, I recently got an extension tube. When I use it with my 70-210, I have to zoom to focus. What is my effective focal length going to be like? The centre of the range? The widest point? How many mm in extension tube would I need to get 1:1?
     
  2. Ron Evers

    Ron Evers Been spending a lot of time on here!

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    I will answer part of your question & leave the rest to others. When the extension tube/bellows is equal to the focal length of the lens you will have a 1:1 macro. i.e. 35mm lens+35mm extension = 1:1.
     
  3. jennyjen

    jennyjen TPF Noob!

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    thats an interesting question.. I'd like to know some of these things myself. [​IMG]
     
  4. SushiWarrior

    SushiWarrior TPF Noob!

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    I have a 70-210 lens, what will I need to get 1:1? That's what I need to know. As you may or may not know with a zoom lens and an extension tube, zooming actually focuses.

    I have also considered getting a reversing ring, as doing a little handheld shooting with the 50 held in fron reversed got some great results, albeit lots of vignetting (probably because of my handholding).
     
  5. usayit

    usayit No longer a newbie, moving up!

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    It would be easier if you had a link to the knockoff...
     
  6. SushiWarrior

    SushiWarrior TPF Noob!

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  7. Inst!nct

    Inst!nct TPF Noob!

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    generally i believe knock offs dont have all the compatibility or/and functions.. or reliability while im at it
     
  8. SushiWarrior

    SushiWarrior TPF Noob!

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    Well, considering I will be using totally manual shooting anyways (this would only be studio/product sort of photography) and I use all manual anyways, that isn't much of a problem. And, when I can buy 5+ for the price of one good speedlight, reliability (while very nice) isn't a big issue either.

    Also, does anyone know if any knockoffs are any good in particular? Like one good seller, or one good "brand" (maybe just a value brand?).
     
  9. usayit

    usayit No longer a newbie, moving up!

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    Forget it... power is not variable.

    If your intention is a "strobist" setup with the flash on a stand bounced in an umbrella, you can find some 285s, 283, or old sunpaks on ebay that should serve you well. Just be careful of trigger voltages.

    [EDIT]

    Is that ebay ad for the flash correct... GN of only 24? That's not very powerful.
     
  10. matt62485

    matt62485 TPF Noob!

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    i think Ron made it as straight forward as it needed to be... but youre extension tube will need to equal your focal length for a 1:1 ratio... it only makes sense. since you have 70-210 to work with and you wanted to shot at 80mm focal length ud need a 80mm extension to have a 1:1. Zoom focuses? :confused:
     
  11. gsgary

    gsgary Been spending a lot of time on here!

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    I think there is a good clue in the price, CRAP look at the guide number and recycle time
     
  12. Ron Evers

    Ron Evers Been spending a lot of time on here!

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    70mm of extension tubes with minimum zoom (70mm).
     

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