candc said:this lens seems pretty good for what its supposed to do, that is give you a big long zoom range in a relatively light and compact package that works in good light. that's not what i want, i want a really good 600 f/4 that doesn't cost $12000. i guess sigma is working on one (cr1). it seems that everybody that is interested in this lens wants 600mm so just make a prime!
in over 90% of time i am using it at 600mm , only zoom out while i travel and looking for target
(too complicated location, cannot find birds keeping at 600mm - wildlife newbie common issue)
tamron does not have prime now ... (only those macro lens)
then the tele prime will not exceed 8) (seems true... not sure why they not making prime lens)
sigma will have sport series new lens and as sigma really working hard on new lens series , it should be great but of coz the price will get closer to canon (maybe like 50% to 70 % price tag ?)
i love my 35.4 A and the 120-300 sport are impressive too (just playing it a few times while a good person let me try it , that lens have 2.8 fast aperture although the size and price much bigger than this tamron , working well for me in job which i use 70 200 2.8 II + 1.4/2x TC there . their target are different , like a value tele lens and a premium tele lens hoho~.
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