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tiger98 Jan 26, 2007 9:58 PM

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Trying out the Sigma 135 - 400 mm lens, was able to get a few bird shots. Jim

tiger98 Jan 26, 2007 9:58 PM

1 Attachment(s)

tiger98 Jan 26, 2007 10:03 PM

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#3 Anyone know what kind of bird this is?

Polytrope Jan 26, 2007 11:07 PM

I like the photos very much. Thanks for posting.

The third bird looks like a curve-billed thrasher:

In the USA, found mostly in southern Arizona and New Mexico, and in southwestern Texas. I don't think I've ever seen one in person, so to speak.


Maw Harley Jan 26, 2007 11:10 PM

Jim, I believe #3 to be a curve billed thrasher. All three shots are wonderful,,,

Maw Harley Jan 26, 2007 11:13 PM

Ooops,,, took to long to finish my post. :G.

Will, I tried that link but it didn't work. What site is it from????

Polytrope Jan 26, 2007 11:31 PM

Maw, first link I posted - the long one you probably clicked - was defective. I've replaced it with a short link. Works for me here. Try it again and let me know. Here it is again:

By the way, if I don't recognize a bird, I usually poke around in Sibley first. But this site can also be very helpful:


tiger98 Jan 26, 2007 11:55 PM

Thanks for viewing and the comments, and for the info Will. Jim

tiger98 Jan 26, 2007 11:57 PM

Thanks for the comments Maw! Will agreed with you on the kind of bird, thanks to both of you. Jim

Polytrope Jan 27, 2007 12:23 AM

tiger98 wrote:

Trying out the Sigma 135 - 400 mm lens, was able to get a few bird shots. Jim

There are apparently two versions of this lens available: the DG and the non-DG. Which do you have? Very little difference in price between them, although I assume that if I had a choice, the DG would be preferable. ("DG" is Sigma's designation for a lens that has been manufactured specifically for use with digital cameras.)

The reviews of the lens that I can find are generally positive, with some reservations. I'm never sure if the complaints don't come from people whose standards are unreasonable, given the lens's price. I've been thinking about this lens for over a week now and after seeing your pictures, I actually placed an order at Adorama - and then immediately wrote to cancel it so I can think a little more. Anyway, you've actually got it. What do you think? Is the auto-focus loud or slow? I gather that the lens is obscenely long when fully extended. Do you find that awkward? I assume it's possible to use the lens, especially at under 300mm, handheld, yes? Did you use a tripod for these excellent shots? And by any chance did you use a teleconverter when you took these shots, or were they taken with the lens alone?

By the way, I gather that shot #1 was taken at 400, while shots #2 and #3 were taken at 300mm. From the reviews I've read, I gather that this lens, like so many zooms, is at its best in the middle of its range, say from 200-300mm, and from f/8 to something in the teens. Do you find that to be the case? I like all three shots, but I think the first shot's image quality is a little lower than that of the other two - not enough though to cause me to be unhappy!

Sorry for so many questions. Good photos.


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