Will a 1:1 macro get closer than this?

Discussion in 'Photography Beginners' Forum' started by burstintoflame81, Feb 26, 2010.

  1. burstintoflame81

    burstintoflame81 TPF Noob!

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    I am wanting to get into macro photography. I am thinking of selling my 85mm f1.8 to get a 1:1 macro. This pic was taken with my 85mm with a 250d closeup lens. This is a crap pic, I just was in a hurry to show an example. I have never used a 1:1 macro, would you consider this pic more of a 2:1 ? Thanks.

    [​IMG]
     
  2. Overread

    Overread has a hat around here somewhere Staff Member Supporting Member

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    Take a photo of a rule at max magnification you can get with the ruler running length ways through the frame (ie along the longest side). Then count the number of mm that the image captures.
    Take this number and divide the longside of the camera sensor width by that number and you get the macro ratio.

    eg a 1:1 would give an answer of around 1
    a 2:1 would give an answer of around 2 and so on.


    is your camera fullframe or crop sensor?
     
  3. burstintoflame81

    burstintoflame81 TPF Noob!

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    My camera is crop sensor Canon T1i. That pic was taken as close as I could get while still being able to focus.

    Do you think you could get a more closeup, more detailed image of a standard sized pencil using a Macro 1:1 lens? I guess that would answer my question more than knowing the actual mathematics behind it. ( Although I do appreciate the explanation of it )
     
  4. djacobox372

    djacobox372 No longer a newbie, moving up!

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    That's about 1:1, however the image quality is pretty bad--likely due to using a closeup filter instead of extension tubes or a true macro lens.
     
  5. Overread

    Overread has a hat around here somewhere Staff Member Supporting Member

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    It's rather late for me to put together a proper thread - so for now I'll give you some examples of macro shots on a coin to give you an idea.

    its a 2p coin from the UK (though I know that probably just confuses a bit more for you)
    At 1:1 that is true macro and what most of the current line of prime macro lenses achive at their most:

    [​IMG]
    f8 at 1 times on Flickr - Photo Sharing!

    2:1 - double life size
    [​IMG]
    f8 at 2 times on Flickr - Photo Sharing!

    3:1 - three times life size.
    [​IMG]
    f8 at 3 times on Flickr - Photo Sharing!
     
  6. Overread

    Overread has a hat around here somewhere Staff Member Supporting Member

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    It might be and might not be. Its a 250D which I take to be the canon diopter (correct name for a close up/macro filter) for the powershot camera series. The 500D from canon gets good ratings and the 250D should be fairly decent I would expect.
    The image quality could be any number of factors including using the wrong aperture and lighting setups.
     
  7. RalphP13

    RalphP13 TPF Noob!

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    I don't know if this will help you, but this is a standard size pencil taken with a 1:1 macro lens (105 mm macro).
    I focused as close as possible on a crop sensor (Nikon D90).

    This image was resized but not cropped.
    [​IMG]

    This is the same picture.
    This image was not resized, just cropped.
    [​IMG]

    Hope this helps.


    Ralph
     
    Last edited: Feb 26, 2010
  8. burstintoflame81

    burstintoflame81 TPF Noob!

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    Thanks for all of the examples guys.

    As for image quality, I clearly stated that it was a crap pic. I shot it on my desk with a little flashlight I had laying near by. I mainly was making reference to the distance. I wasn't trying to get the lighting right or get some fancy blur. I was just snapping a quick pic to get it online as quick as possible.

    Also, yes it is a 250D canon diopter/closeup lense. It is the same as the 500d except I believe this has 2 elements compared to the 500D which only has one. The 250D is made for 30 to 135mm and the 500D is made for 70-300mm.

    The whole reason I started this thread, is that I have people lined up on craigslist wanting my 85mm so I am trying to figure if its better to get rid of that and get like a Tokina 100mm 1:1 macro when I could have the portrait lens and also a macro using the closeup lens and have the best of both worlds.
     
  9. burstintoflame81

    burstintoflame81 TPF Noob!

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    Another question, since we are on the topic, if I kept the 85mm with closeup lens, can I attach a ring flash to that? Do ring flashes attach like a filter or do they clamp onto the end of the lens?
     
  10. JimmyO

    JimmyO TPF Noob!

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    Before going for a new lens try extension tubes, they wont effect image quality like a filter will
     
  11. Ron Evers

    Ron Evers Been spending a lot of time on here!

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    Tooth pics using extension tubes & a 55mm lens on G1. (x2 crop factor)



    [​IMG]


    [​IMG]
     
  12. burstintoflame81

    burstintoflame81 TPF Noob!

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    Wow, maybe I should pick up some extension tubes then. What length did you use on the toothpicks? I know Kenko makes a set of three for like $150. Maybe I will pick them up this week.
     

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