I have a vivitar 75-300 mm 1:4.5-5.6 macro focusing zoom lens. i cannot find any information on it on the internet. example: how much is it worth if i decide to sell it? the camera i have for it is a vivitar v4000 and its in need of repair. i cant find any info on this lens. its like it never existed. vivitar doesnt have a website now as they sold to another company. any info would be GREATLY appreciated. Thank you so much!
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Haha!! Maybe its something you're not doing, LOL. Look on the side of the lens. Most of the 70-300 macros have a slide switch. My Tamron, for instance, needs to be zoomed out to 300, then slide the switch to Macro and its ok. Look for the slide switch. You might also notice lines of a different color to denote Macro. Some days it too tough to be smarter than the lens, LOL.
Put the macro adapter on the camera and move the camera in and out from an object to try to focus the object in the display. Remember, macro is very small, very close and very small field-of-focus. I hope this helps.
I will try to help you, but please understand that my experience is with Nikon film cameras. Assuming that the D60 works in a manner similar to a Nikon 35 mm body and that Sigma macro lens work like Nikon macro lens, you should be able to determine the usable subject to lens distance by experimentation. First, make sure the lens is in the macro mode. To do this you must set the auto-focus mode control to the manual focus mode (see your manual). On Nikon lenses, you must first set the focus ring to infinity, then move slider switch, which has two positions marked; "normal" and "macro., to the macro position. You should now be able to rotate the focus ring to the macro range. Use the zoom ring to zoom in and out and focus with the focus ring. The the range over which the lens to subject to lens distance will yield an in focus image will be rather limited and in the range of an inch or so to 6 or 8 inches.
I think the most prudent solution is to give up on the idea. What do you need that for? This lens already has a huge range of 28 .. 300 mm in film equivalents, and it is marginally useful at 300 mm. Whatever else you put on it will make it worse (less light, poor focus and aberrations). Similarly, at the wide end, while it is technically possible to add a wide-angle element to shorten the focal distance to about 20 mm, that will also result in a loss of light and poor peripheral focus, so you will be much better off taking 2-3 pictures and blending them whenever you need a wider angle. This lens is a miracle of optimization -- it already has the attachments you are contemplating, plus macro and super-macro. I don't think its range can be expanded any further without an unacceptable degradation of quality.
(From Sigma lens literature) Capable of macro photography, this
lens has a 1:2 maximum close-up magnification at the 300 mm focal
length. It's the ideal high performance lens for portraits, sports
photography, nature photography, and other types of photography that
frequently use the telephoto range. It also has a switch for changeover
to macro photography at focal lengths between 200mm and 300mm with a
maximum close-up magnification from 1:2.9 to 1:2. The minimum focusing
distance is 1.5m / 59 in. at all zoom settings.