Canon Ws 1200h Manual Dexterity
I have a few 28mm lenses so thought I'd do a couple of tests to see how they compared. To start with these are taken at infinity focus and shoot mode aperture priority. I tried to take wide open and then at f5.6 and then at f8. Treiber Hp Scanjet 3400c Windows Vista on this page.
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These are jpegs directly from camera and I've renamed to reflect aperture and lens. I included weights as well which I took with digital kitchen scales. These are either gifts or I've had them thrown in for free with cameras I've bought so to check value I've done an ebay completed listings search and included lowest and highest sales over past month. 28mm Lens details: Hanimex M.C Auto - f2.8 - OM mount. Can't seem to change aperture? Stuck wide open at f2.8.
Poor quality images. Need to work out how to stop down. 7021862 Ebay £10-£30 245 grams focusses to 30cm SMC Pentax-A- f2.8 - Pentax bayonet k mount - 5370190 - best of the batch. Ebay £50-£80 169 grams 5 blade aperture focusses to 30cm Sirius MC Auto - f2.8 - 933952 - M42 - Ebay £2-£20 weight 196 grams 6 blade aperture - focusses to 20cm Vivitar Auto Wide Angle f2.5 Ebay £10-£55 -22752109 - M42 This one's a different shape to others. It has a wider front with a 67mm filter thread. 6 blade aperture focusses to 30cm I do have a 28mm Carl Zeiss Jena which was one of my Dad's but although it looks like a Pentax K mount it won't work with my adapter.
Jtan_pdr wrote: looks like a pentax and vivitar semi finals. Hp Service Manuals Pdf there. Which do u guys think is better? Yep, I've heard people say any lens is good at f8 but the Sirius seems to give washed out pics no matter what you do with the aperture. Good job it was a freebie! I'll do some closer shots soon as I can't really split the Pentax and Vivitar although the Vivitar does seem better wide open! Oh dear - it looks like I'm becoming an Ebay addict.
Just picked up an SLR with four lenses for £4.99 (£15 p&p). One looks to be an SMC Pentax-M 50mm f1.7. This makes the deal worthwhile but I wonder what the other 3 will be? I guess next batch to test will be 50mm!
John Bean (UK) wrote: The differences were clear enough to me without the composites, I tend to notice the flat look due to lack of micro contrast even without a comparison image from a better lens. The composites you made make are very useful, they make the differences clear to anyone. PS: the MF Pentax 28/2.8 was never a great lens the way the older 28/3.5's or the current AF 28/2.8 are, but it's certainly a lot better than any of the others you tested To be honest I could see there was a difference between Pentax and Vivitar but it wasn't that obvious to me until I'd made the composites. When testing in the future I think I'll make more use of them. I think this is the Vivitar and having read around the net it seems to have an okay reputation. Apparently it's made by Kiron. Jtan_pdr wrote: unless john's will to let go of (any) of his amazing ones.
Too late, they're all gone. Install Windows Xp On Hp Dc 7900 Small Form Factor. My current circumstances don't allow the luxury of collecting lenses just because they're nice.
If they sit too long on the shelf they are a waste; I'd rather they got used by someone else and at the same time fund the purchase of something I'll use regularly. After a lot of trial purchases (and re-sales!) to find which lenses worked best on the NEX for me I eventually I settled on the Sony E16 plus 25, 35, 50 (x2), and 90mm Leitz and Voigtlander rangefinder lenses.
Rangefinder lenses are tiny on the NEX and don't have to cost an arm and a leg; only one of the rangefinder lenses I bought cost more than the E16, one was significantly less, and the others about the same cost. Mostly they were funded by selling off my unwanted Sony kit zoom and my whole Panasonic micro 4/3 kit that I used before buying the NEX. Tom, took the non-focusing enlarger lens apart to work out some kind of recessed mounting adapter for its outer barrel, so that it could nestle deeply in a focusing helicoid and get within 21mm of the Nex sensor. But couldn't figure out how to reassemble it with the adjustable aperture leaves in perfect working order. So simply drilled a 3mm hole into a piece of paper and put it in the middle of the lens where the aperture blades were. Lens is forever at F8 unless I remove the aperture paper. In some ways a better aperture than the shiny-smooth original aperture leaves, because was able to paint the paper aperture hole with super rough, flat black paint.
Increased glare resistance, see the 2nd sample photo below, helped by the simple 6-element prime lens design. What I should have done instead of disassembling the lens is purchased, say, a $100 52mm focusing helicoid, or the expensive, made-for-the-lens Rodenstock focusing mount. Those focusers would let the lens mount way inside them with the use of dished adapters, instead of messing with taking apart the lens. With only a slight loss of sanity, the fixed F8 aperture is not so bad for a wide angle. There's so much depth of field (see below) that I don't miss the smaller apertures.