Oly 45 1.8 with Pana GTC1 converter... works !!!

Started May 17, 2012 | Discussions thread
bobn2
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Re: Front versus rear TC
In reply to OM User, May 19, 2012

OM User wrote:

If front mounted teleconverters have little (I will use this word in conjunction with the ongoing debate) effect on F-number then why didn't we see more of them in the film SLR days where most people had a rear mounted 1.4X or 2.0X in their kit bag with the adverse effect on effective maximum aperture?

There are several reasons why they are not used so much:

  • They are larger.

  • They degrade the image more in general (or put it another way, harder to make so they don't degrade the image)

  • They need to be matched to filter size and AOV

  • Generally they are more complex and therefore expensive.

Of course, they are coomonplace for compacts and video, where IQ demands are not as high.

second question: would you have to remove any filter from your lens before attaching a front mounted TC?

Moving the converter our would restrict its angle of view and might result in more vignetting.
--
Bob

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