Anyone else has this lens? Some info about the lens:
On the front it's written: Vivitar 100-300mm 1:5 Close Focusing Auto Zoom
62mm filter size. lens is (18cm) lens and heavy (maybe 800g). Focus throw is around 100 degree. Min. range is 2 meter but it has a close focus setting where you can get close up to around 20cm. Aperture is 5-22 (no half clicks).
Metering is just like Pentax M lens, aka stopped down but it's opened to max aperture for focusing (which is F5). This is actually the most interesting point from this lens for me. I'm using a chinese split-focusing-screen and by aperture 5.6 it becomes half black. I want/need the max aperture to be less than 5.6 so I can manual focus with the split screen. Other cheap manual tele lenses I found has at least 5.6 max aperture at the longest focal.
Image quality is good enough for me, I think it's comparable to the common 70-300mm consumer tele zooms. Cant really compare because I dont have any of those. Sharpness is very good IMHO, although it has somewhat muted color / lack contrast as most of old lenses. CA is there if you look closely.
It tends to overexposed 2/3 stop with my *ist DS. Since DS has no exposure compensation in M mode, using this lens is rather awkward for me. My taking picture procedure is as follow: focus, push AE-L button to meter, slide the dial two times to compensate 2/3 stop, and finally click the shutter.
The combination of DS and this lens is front heavy so it gives a lot of stress / strain on my left hand. Plus, I like to take portrait orientation often and it even gives more strain to my hand. Especially when I try to push the AE-L button on the back side of camera with my right thumb, which loosen the grip of my right hand and increase the weight I have to keep with my left hand.
Manual focusing for lens this heavy and focal this long is somewhat harder than I thought. If the subject fills or almost fill the the frame then it's not that hard but it's much harder when the subject is smaller and even harder when it's moving slightly >.<
I intend to use this lens for candid and snapshot, but the weight and umm the difficulty of manual focusing made me want to switch to consumer zooms like Tamron or Sigma 70-300mm. Of course DA 55-300mm would be better but it's a bit to expensive for me (in Korea it's around $500 new and no one selling used ones, probably because it's too good lol). I could get a used Sigma 70-300mm for around $200 (Tamron one is a little cheaper).
Here's some image samples, they're have been post-processed, but only to increase contrast and maybe a little sharpening. Tell me, should I keep this lens, or buy Tamron / Sigma 70-300mm? Would I lose IQ or actually gain better IQ? I wouldn't have to use manual focus but how fast / accurate the AF of those consumer lenses? Normally I dont really mind manual focusing, but Im planning to buy a second body and would like to have one specially for candid and snapshot and the other for things that I can take picture slowly with manual lens (and can be more creative with composition too). The Sigma / Tamron has max aperture 5.6 while this lens has max aperture 5. The difference is negligible except for manual focusing, yes? No?
All comments are welcome. TIA.
These ones taken during sunny days, ISO 800, either F5 or F8, various shutter speeds from 1/250 to 1/1000
This one is taken very close to sunset, not much available light, I've taken a lot of pictures but only this one I really like, others mostly blur due to shake and or not properly focused because it's dark and it's F5.
ISO 800, F5 1/40