Originally posted by hoanpham I can see that LBA has different variants:
- buy lenses, play with them, compare, upload photos, write reviews, then actually able to sell them, so next man can hold it.
- buy lenses, play with them, doing all regular thing about a lens, then still not able to sell, even with several duplicates copies.
I cant understand, what's the point of buying lenses and so put them for sale?
Instead of watching photos of gears, it IS much better to hold the gear, watching, touching, turn them in different angle/reflection and experience truely satisfied of your senses...
Soft wide open? can i use that soft look to some thing?
CA or PF? may be it still useable in some cases?
Is a lens faulty? can i dis-assemble it and watch the inner working?
do i have 2 or 3 of the same? may be i can drill new holes for double up number of iris blades - put 2 lenses into one?
I think there might be a few more reasons for lba. Some buy a lot of lenses, pick out the good ones and sell the rest. I have always though this was just due to variation in the quality of copies but an article recently posted about here sheds a little more light on it. Its from a rental company that sugests every conponent of every camera or lens falls with in a range of manufacturing tolerences plus or minus. If your camera is out on the minus side and your lens is out on the plus side (even though both are witin spec), its not going to perform well. If both are out of spec on the plus side, it will perform much better. Thats an over simplification to make it more understandable as there are many parts that each can individually be out in any dimention or direction. Its more about the final output of a complex system with many parts out of tolerence in diffrent directions. They could send a lens to one customer and it performed poorly, and send the same lens to another customer and it performed great. Even tempature can have an effect. A thicker piece of metal is going to expand more in hot conditions and contract less in cold, so variations can change in diffrent tempature conditions.
Basically some lenses are going to play better with your camera than others. I assume that lenses that are considered better have better quality control and are closer to spec but its still no guarentee it will work well with your camera.
I'm sure I'm not the only one that winds up with lenses that they didn't really want too (though its another lens to play with). The lens that I took the posted picture with was a freebie that I neither researched or cared about the quality of when I bid. I wanted the several filters (some hoya hmc) that it was bundeled with. I also have a vivitar 70-200mm on the way (no idea what aperture value or particular model it is) as well as a ricoh camera I could care less about. The 35-70mm 2.8 constant that came with it is what I really wanted. I also have 5 camera bodies on the way for adapter experiments that comes with 1 unknown lens in unknown condition (I have had unknow items like that turn out to be in exelent usable condition before).
I'll be holding on to all my lenses for quite a while but there is some reason behind that. My only body is an old ist-ds. I got it old stock new so it has only had about 3 years actual use. High iso perofrmance is not that great compared to newer bodys. It could be a while before I can afford it but a new body with better high iso performance (any newer pentax body compared to mine) would make a lot more sense than trying to obtain expensive, fast lenses. It also gives me shake reduction, back focus adjustment, higher resolution etc. After all the hours I have invested hunting down bargains on lenses, It wouldn't make much sense to find the ones that work with my ist-ds and get rid of the rest, when I know I am eventually going to get a new body.
That is my story and I'm sticking to it (what other possible reason could I have for keeping all those lenses, lol).
@Wolfiegirl, not to complicate things further for your new found lba, but you might want to take your time and try out those lenses on all your bodies before you sell them (and you know you want to keep them bwahahahaha). I gather that variations are less of an issue with good built old lenses as they were more precision built than the typical lens today which is often built sloppy and then calibrated, but they still have some variation and your camera bodies very too. I understand you can have your bodies (and pentax lenses at least) calibrated to match, but I also gather that the cost excludes all but the very wealthy from doing it.