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Macro Lens

Discussion in 'Pentax Chat' started by Ratcatcherpix, Jan 10, 2008.

  1. Ratcatcherpix

    Ratcatcherpix Well-Known Member

    Thanks for the info but i don't think it's the EX DG model just EX.
     
  2. Ratcatcherpix

    Ratcatcherpix Well-Known Member

    Just a thought would i not loose at least two stops on the Pentax & Tamron if using the macro/extensions.
     
  3. Monobod

    Monobod Phantom of the forum

    Yes, something like that, hence the advantage of f2.8!!
     
  4. Ratcatcherpix

    Ratcatcherpix Well-Known Member

    Yes that's what i thought, the thing is i was really interested in the Pentax but with f4 being the minimum and loosing 2 stops that will make it about f6 hardly worth it.I'm a bit confused about the Tamron 2:5 as the owner says it's a 52BB model with a 55mm filter thread. But from what i've found out about it the 52BB has a 49mm filter thread size and the 55BB model has the 55mm.
     
  5. nimbus

    nimbus Well-Known Member

    2 stops lost on f4 will take you to f8, also this will be well nigh impossible to focus accurately.
     

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