[OM] Re: 2X TC's

[Chuck Norcutt]

In general, adding any other optical element to a lens (including a 
filter) will cause some degree of image degradation.  The only question 
is:  How bad is it?  You've already gotten a couple of answers 
indicating that two 2X's is probably not a worthwhile thing to do and I 
would agree.  It's rare that you even find someone using a 3X... at 
least satisfactorily.  For best results limit yourself to a 2X and even 
that must be of excellent quality and limited to attaching to lenses in 
the telephoto range.

Chuck Norcutt

Allen Coltrin wrote:
> Good morning. I have a question that hopefully someone can answer.Can you 
> stack 2x TC's without causing image degredation? i.e. 300mm+2x+2x = haw many 
> more?
> 
> TIA,
> Allen

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