The 1.4x was built for big glasses, like 180/2, 250/2 and 350/2.8, so to
match the price of them the 1.4x must be expensive :-)
The 2x was built for cheap slow lens (except 100 and 135 f2.8 which are not
too slow), such as 100/2.8, 135/2.8, 200/4, 200/5, 100-200/5... ect. To
match with such lenses the selling price cannot be too high.
C.H.Ling
----- Original Message -----
From: "Douglas Tourtelot" <tourtelot1@xxxxxxxxx>
>
> On another topic, what is the difference between the 2x and the 1.4x
> extender (apart from the .6 obvious, smarty-pants!!) I found a reasonably
> priced 2x and have seen more of them for sale. The 1.4 seems rarer and
> pricier. But is there a quality (glass) difference. Probably less stop
> loss, but is the 2x "bad" for any reason?
>
> Inquiring minds want to know.
>
> D.
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