2 comments about Sigma 70-200mm f/2.8 EX DG APO HSM Large Aperture Macro Zoom Lens for Nikon Digital SLR Cameras.

1. I recently just picked up this lens for myself. I have to say this is one of the best lenses I have used. The auto-focus is fast and silent. It doens't hunt, even when you zoom straight to 200mm. I also love that the minimum focusing distance is 3 feet. My dad has an older version of this lens for the Minolta mount and he is envious of the focusing distance.
   
   I will say that at 200mm at f/2.8, there is a touch of softness, but it's not objectionable for my taste. I would recommend trying this lens if you can to make sure you would be willing to deal with the softness. Otherwise at all other focal lengths, it is tack sharp!
   
   This lens is also heavy at 3 pounds. It can get tiring to hold it all day long, so I would recommend a monopod for support. Overall, I really love this lens and would recommend it to anyone looking for a good telephoto lens.



2. I'm a huge fan of my Sigma 70-200 2.8. I do a lot of indoor sports photography and can get some really crisp pictures with this lens. The only thing is that the lens that I was sent by amazon is different from the one pictured here. It did not have an automatic/manual switch on the lens, which I thought would be a problem with my D40, but DOES still work with my D40- both manual and automatic.
   
   I highly recommend this lens. It's cheaper than the alternatives and gets the job done.

1 comments about Sigma 12-24mm f/4.5-5.6 EX DG IF HSM Aspherical Ultra Wide Angle Zoom Lens for Pentax and Samsung SLR Cameras.

1. I was torn between the Sigma and the Pentax zooms at this focal range. they both seemed to offer to adequately provide the wide angle range that I needed to do the everyday shooting of building interiors and exteriors. Both were wide enough and seemed optically good enough. The test images I saw seemed like they might be sharp enough, and they were surprisingly free of spherical distortions for lenses that wide. Both lenses were reported to be prone to some bad optical flare effects from direct sun on the lens. It's all true for the Sigma at least. It could be sharper. It is, however, good enough if you're using your shot nearly full frame. If you're needing to crop much of the image the sharpness may not be there to get a good large print. the Sigma was about a hundred bucks under the price of the Pentax so I went for it. I have nothing to go on to compare the Sigma to the Pentax 12-24 zooms, except the sample images posted on Amazon and in other reviews on line seemed on close reading to favor the Sigma. I think they both are nothing to write home about in the sharpness department when you zoom way in. But they are still darned wide zooms and reasonably free of spherical distortion for a lens that wide. I'm getting good enough images and prints to use at 8X10, (without photo shopping any distortion out) provided I'm careful to frame the shot close to the way I want to print it.

No comments about Sigma 18-50mm f/3.5-5.6 DC Aspherical Zoom Lens for Sigma Digital SLR Cameras.

No comments about Sigma 20-40mm f/2.8 EX DG Aspherical Wide Angle Zoom Lens for Nikon SLR Cameras.

No comments about Sigma 18-50mm F/2.8 EX DC Lens for Minolta and Sony Digital SLR Cameras.

No comments about Sigma 30mm f/1.4 EX DC HSM Lens for Sigma Digital SLR Cameras.

2 comments about Sigma APO Teleconverter 2x EX DG for Minolta and Sony Digital SLR Cameras.

1. I do not blame Sigma (except for printing the worse instructions I've ever seen), I blame Amazon for not advertising the fact that Sigma Teleconverters are for use with Sigma lenses only. Though the Teleconverter attaches to the a100, neither Sony nor Milolta lenses will attach to it.



2. The reviewer who indicates this teleconverter is not compatible with Sony/Minolta lenses is mistaken. He should have checked the compatibility list. If he had, he would have found this teleconverter is compatible with the following lenses:
   
   SIGMA AF 1.4X 2X
   o APO 120-300mm F2.8 EX IF HSM AF AF
   o APO 120-300mm F2.8 EX DG HSM AF AF
   o APO 70-200mm F2.8 EX HSM AF AF
   o APO 70-200mm F2.8 EX DG HSM AF AF
   o APO 300mm F2.8 EX HSM AF AF
   o APO 300mm F2.8 EX DG HSM AF AF
   o APO 300-800mm F5.6 EX IF HSM MF MF
   o APO 300-800mm F5.6 EX DG HSM MF MF
   o APO 80-400mm F4.5-5.6 EX OS MF MF
   o APO 80-400mm F4.5-5.6 EX DG OS MF MF
   APO 50-150mm F2.8 EX DC AF AF
   o*3 APO 50-500mm F4-6.3 EX RF HSM MF MF
   o*3 APO 50-500mm F4-6.3 EX DG HSM MF MF
   o APO 100-300mm F4 EX IF HSM AF MF
   o APO 100-300mm F4 EX DG HSM AF MF
   o*2 APO MACRO 150mm F2.8 EX DG HSM AF/MF MF
   o*1 APO MACRO 180mm F3.5 EX IF HSM AF/MF MF
   o*1 APO MACRO 180mm F3.5 EX DG HSM AF/MF MF
   o APO 500mm F4.5 EX HSM MF MF
   o APO 500mm F4.5 EX DG HSM MF MF
   o APO 800mm F5.6 EX HSM MF MF
   o APO 800mm F5.6 EX DG HSM MF MF
   APO 70-210mm F2.8 MF MF
   APO 300mm F2.8 MF MF
   APO TELE MACRO 300mm F4 MF MF
   APO TELE MACRO 300mm F4 HSM MF MF
   APO TELE MACRO 400mm F5.6 MF MF
   APO TELE MACRO 400mm F5.6 HSM MF MF
   APO 500mm F4.5 MF MF
   APO 800mm F5.6 MF MF
   APO 1000mm F8 MF MF
   
   
   CANON AF 1.4X 2X
   o APO 120-300mm F2.8 EX IF HSM AF AF
   o APO 120-300mm F2.8 EX DG HSM AF AF
   o APO 70-200mm F2.8 EX HSM AF AF
   o APO 70-200mm F2.8 EX DG HSM AF AF
   o APO 300mm F2.8 EX HSM AF AF
   o APO 300mm F2.8 EX DG HSM AF AF
   o APO 300-800mm F5.6 EX IF HSM MF MF
   o APO 300-800mm F5.6 EX DG HSM MF MF
   o APO 80-400mm F4.5-5.6 EX OS MF MF
   o APO 80-400mm F4.5-5.6 EX DG OS MF MF
   APO 50-150mm F2.8 EX DC AF AF
   o*3 APO 50-500mm F4-6.3 EX RF HSM MF MF
   o*3 APO 50-500mm F4-6.3 EX DG HSM MF MF
   o APO 100-300mm F4 EX IF HSM AF MF
   o APO 100-300mm F4 EX DG HSM AF MF
   o*2 APO MACRO 150mm F2.8 EX DG HSM AF/MF MF
   o*1 APO MACRO 180mm F3.5 EX IF HSM AF/MF MF
   o*1 APO MACRO 180mm F3.5 EX DG HSM AF/MF MF
   o APO 500mm F4.5 EX HSM MF MF
   o APO 500mm F4.5 EX DG HSM MF MF
   o APO 800mm F5.6 EX HSM MF MF
   o APO 800mm F5.6 EX DG HSM MF MF
   APO 70-210mm F2.8 MF MF
   APO 300mm F2.8 MF MF
   APO TELE MACRO 300mm F4 MF MF
   APO TELE MACRO 300mm F4 HSM MF MF
   APO TELE MACRO 400mm F5.6 MF MF
   APO TELE MACRO 400mm F5.6 HSM MF MF
   APO 500mm F4.5 MF MF
   APO 800mm F5.6 MF MF
   APO 1000mm F8 MF MF
   
   
   MINOLTA AF 1.4X 2X
   APO 70-200mm F2.8 EX IF AF AF
   APO 70-200mm F2.8 EX DG AF AF
   APO 300mm F2.8 EX AF AF
   APO 300mm F2.8 EX DG AF AF
   o*3 APO 50-500mm F4-6.3 EX RF MF MF
   o*3 APO 50-500mm F4-6.3 EX DG MF MF
   APO 100-300mm F4 EX IF AF MF
   APO 100-300mm F4 EX DG AF MF
   APO MACRO 180mm F3.5 EX IF MF MF
   APO MACRO 180mm F3.5 EX DG MF MF
   APO 500mm F4.5 EX MF MF
   APO 500mm F4.5 EX DG MF MF
   APO 800mm F5.6 EX MF MF
   APO 800mm F5.6 EX DG MF MF
   APO 70-210mm F2.8 AF AF
   APO 300mm F2.8 AF AF
   APO TELE MACRO 300mm F4 AF MF
   APO TELE MACRO 400mm F5.6 MF MF
   APO 500mm F4.5 MF MF
   APO 800mm F5.6 MF MF
   APO 1000mm F8
   
   Dr. Arthur Kirk

1 comments about Sigma 28mm f/1.8 EX DG Aspherical Macro Large Aperture Wide Angle Lens for Canon SLR Cameras.

1. I now have bought two lenses that were not designed for the smaller digital camera sensor, and both consistently fail to autofocus, the Sigma 28mm and the Canon 50mm f1.8 II, both relatively inexpensive lenses, and both designed for film cameras I believe. I was able to get both to focus most of the time by using my "live view" focusing, but it is slow and you can't use the viewfinder. I just couldn't justify keeping this large, heavy, no doubt very high quality lens if it was going to be that difficult to use.
   The kit lens that came with my Canon XSi focuses much more reliably, maybe because that lens is designed for small sensor cameras.

3 comments about Sigma APO Teleconverter 1.4x EX DG for Minolta and Sony Digital SLR Cameras.

1. Great addition to the 50-500mm sigma. Manual focus only, but really gets close to your subject from a distance. Very well built, solid.



2. this is only compatible with select Sigma APO Lenses. Most other lenses won't even fit on it.



3. The item arrived in the original box with all original paperwork, but with a Sigma worldwide warranty, not a USA warranty. If there were something wrong with it, I would have to send it to somewhere other than Sigma USA for repair or replacement which could be problematical. This has no bearing on the teleconverter, as it is a genuine product and works very well on my 70-200 f/2.8 EX DG lens. It has little or no effect on sharpness or color.
   
   It's possible that Amazon is unaware that their third-party fulfillment partner is shipping the lower-priced Grey item instead of the USA version since it is priced is the same as the USA version at B&H. It may also be that Sigma only has a Worldwide warranty unlike Sony, Canon, Nikon, etc.
   
   Either way, be aware.

2 comments about Sigma 70mm F/2.8 EX DG Macro Lens for Canon Digital SLR Cameras.

1. terrific lens, really sharp. seems like you get a lot of quality for a fair price. i have a couple of "L" lenses, and they're great, and/but i don't think an "L" glass version of this lens would be much better than this.



2. This is a great lens. We've taken some great shots of flora and fauna with it, also a few sports shots. Image rendition is excellent. We use it on Canon 30D and 40D bodies. It focuses quickly and without a lot of noise. We have no complaints at all with this lens.