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Before spending that kind of money, do a google search of teleconverters and read customer reviews. I did - a lot - and after a lot of thought, I bought the Kenko 1.4X converter. I have the Tamron 18-270 on my Nikon D300s, so it gives me 378mm equivalent. Picture quality is surprisingly good. It'll give you a good idea of how the thing handles at higher mags....you may well decide not to go stronger.A 150-600mm lens is a big, expensive hunk of iron with limited use. The TC fits in a pocket.Higher strengths - 1.8X & 2X don't seem to have the quality, according to reviews, but do the homework. You'll need a very solid tripod and believe me, you'll want a light weight one. My Manfrotto wears me out after a mile or 2.....even with a sling, they're awkward to carry. The camera is almost impossible to hold steady at those magnifications. 500mm is 10X....and you know what it's like hand holding a rifle with 10X scope on a 300 yd target, eh ??The Nikon B700 I use now for a primary camera has a 60X zoom and it's completely impractical. For me, anything over about 20X is a waste. Neat gee-whiz factor but not so good in the field.This is my 2nd Tamron higher magnification lens - the other is on my old Nikon F2. Both are rock solid, quality products.
WB Drifter said:
The zoom ratio of a
150-600mm lens would be 600 / 150 = 4X. The 75-300 would be 300 / 75 =
4X. The minimum focal length to get 10X from a lens with a maximum focal length
of 500mm would be 50mm. That would be something like the Sigma
50mm-500mm which is actually a pretty good lens given the trade-offs for
that zoom ratio.
It's discontinued though ....
Here is one of the "old-timers" - mississippi mac - writing about the Sigma 150-600mm.
WB Drifter said:
I was asking for JB's benefit. I think Mac shot Canons. Flash would probably know.https://forums.floridasportsman.com/discussion/comment/1456116#Comment_1456116I like the advice JB mentioned above. I think he'd be better served to spend more time in post-processing. What do you think?
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