Is this an internal focusing lens? Or does the lens barrel extend as you focus?
133386
It is not an internal focusing lens - the barrel extends as you focus. That being said, there is a convenient macro ratio scale on the lens barrel, and it's very handy when setting up a macro shot. This lens is NOT a fast-focuser; it does not have the Sigma HSM (hyper-sonic motor) technology. This being said - the 105mm f2.8 EX DG is probably the sharpest lens in my bag, including some lenses that were 3x as expensive. Bokeh is spectacular, and if you're willing to slow down and accommodate the older mechanical design, you'll be rewarded with exquisite sharpness and beautiful bokeh.
1257710
Yes. There are actually two macro modes -- one is a "normal" macro mode and a "super" macro mode. The latter allows you to focus to within an inch or so of the lens.
464948
It's a little hard to answer; the lens sits about an inch off the surface, and there is a zoom as wall as a focus...I can tell you that this device is like a litte pocket microscope, easy to use and very powerful.
1490665
The zoom ring is the wide one in front and the manual focus ring is the thin one just behind it. Yes, this lens extends forward when zooming.
593943
No, it's not an add-on or "auxiliary" lens -- it's a full lens in itself. It goes on your DSLR *in place of* any other lens, not added on to an existing lens.
441440
I would consider it a normal lens. That said it is definitely on the border between 'normal' and 'wide'.
1076539
This is a "Stepping Motor Lens". MICRO FOCUS is an automatic feature of this lens.
955255
It is focus-able to the viewer. I can't see clearly past 2 feet without my glasses. I see through this perfectly when I focus it. It's a tough little scope. I've been very happy with it. -DM
318650
Yes it is. I use it in manual setting with my 70-300mm lens. It does not work well with auto focus when the lens is opened fully to 300mm.
846040
This a manual lense. Being 8mm focassing is not a problem as long as you remember to keep it around infinity unless your subject is within a few feet. I have had a lot of success with this lense and would recomend.
149359
Internal Focusing! I love it. I hate lenses that don't, it's weird I know, but I still only buy internal focusing lenses.. This is is absolutely amazing, best lens I've ever owned or used! At first I thought the price would be too high, and while it is expensive, once I used it I consider this lens a great deal! It blows me away.
354391
Hi Richard Yes it is a wider lens and very sharp minimal distortion. I use it a lot for landscapes etc. it's very small and light and for the price I think it's worth it
352997
It's a manual focus lens which means you do the focusing. You can pay extra for an upgraded version of this with auto focus chip Which I did but I have only tried that twice so I cannot say I did everything right and haven't cared to really sit and play with it because I am a manual shooter. The quality of the photos you get with manual focus are amazing though!!
2280986
It is a prism type lens. A prism system shortens the focal length.http://www.carsonoptical.com/Monoculars_and_Spotters/Monoculars_and_Spotters/CF-718
1319467
Yes, there is a barrel on the 02 lens . The smaller adjusts focus and the larger is a zoom.
1433609
No. It's a static lens. Think of it like a large body point and shoot, with a really big zoom.
1169933
Thank you for your interest in our products.The dial outside of the lens is turned, and it focuses it. We hope this information is helpful for you.We are looking forward to hearing form you soon.Reboot Japan