Variation in Identical lens's
May 21, 2012 15:56:35 #
Roger Hicks
Loc: Aquitaine
Rip Tragle wrote:
No matter who printed it and how?
Assuming good quality prints.
Cheers,
R.
May 21, 2012 16:18:21 #
May 21, 2012 16:32:49 #
bikinkawboy
Loc: north central Missouri
RE: jeep daddy, and tis a fine distal femur fracture you have. I know that chicks dig guys with scars, how about distal fractures? If so, let me know how and or where you got yours so I can get one. I need help because while I have more scars on my hands, arms and face than you can count, apparently chicks don't dig farming related scars. I think they must prefer something more like knife fight scars, wrasselin' with a bear scars, gun shot wound scars or mother-in-law inflicted scars.
May 21, 2012 16:33:08 #
rayford2
Loc: New Bethlehem, PA
rpavich wrote:
quote=jsenear Over the years I have noticed a dif... (show quote)
Sounds like a lesson on the difference between precision and accuracy.
May 21, 2012 17:51:08 #
rayford2 wrote:
quote=rpavich quote=jsenear Over the years I hav... (show quote)
I guess I don't get your meaning.
All things manufactured by humans have a tolerance. How acceptable that tolerance is is a matter of opinion.
Anyone can make anything as tight a tolerance as possible..that's not a big trick...but who will pay for it?
There is always a cost-benefit breaking point in manufacturing.
May 21, 2012 19:04:25 #
Tolerance stackup can make a big differences. I have seen worse case assemblies that did not go together in trucks and in high tolerance devices sold to the military; due assembly and part tolerances. Loosening a few screws and all was well. Companies try to make 6 sigma designs (99.997% defect free) which comes close to preventing out of tolereance assemblies. But still there is a range of acceptable in tolerance test results. I was in one plant where parts were inspected and matched to produce the best results.
One ten thousands of an inch could make a diference; of course the parts are like using metric. Sad fact is that there is variation. And given enough samples and time we could pick out the better lens and camera.
The test with respect to sharpness that I posted last week showed that for me; the operator was likely the largest contributor to lack of sharpness.
I wonder if all manufactures do 100% acceptance inspection; or do they do a sample to buy a lot of parts. I have seem escapes from reliable vendors using the sampe or AQL method of accecting parts.
Also consider that some camras fit some hands better than others. I know that it is that way with hand guns.
My conclusion is there is variation in cameras and lenses; there has to be.
One ten thousands of an inch could make a diference; of course the parts are like using metric. Sad fact is that there is variation. And given enough samples and time we could pick out the better lens and camera.
The test with respect to sharpness that I posted last week showed that for me; the operator was likely the largest contributor to lack of sharpness.
I wonder if all manufactures do 100% acceptance inspection; or do they do a sample to buy a lot of parts. I have seem escapes from reliable vendors using the sampe or AQL method of accecting parts.
Also consider that some camras fit some hands better than others. I know that it is that way with hand guns.
My conclusion is there is variation in cameras and lenses; there has to be.
May 21, 2012 19:37:25 #
Hi, I'm new in the forum. To the jsenear question I can say: If you want to be happy, don't compare lenses...;-)
May 21, 2012 19:57:04 #
May 22, 2012 01:46:00 #
bikinkawboy wrote:
RE: jeep daddy, and tis a fine distal femur fracture you have. I know that chicks dig guys with scars, how about distal fractures? If so, let me know how and or where you got yours so I can get one. I need help because while I have more scars on my hands, arms and face than you can count, apparently chicks don't dig farming related scars. I think they must prefer something more like knife fight scars, wrasselin' with a bear scars, gun shot wound scars or mother-in-law inflicted scars.
I don't think chicks will dig my scar story but just so you know - I was riding my dirt bike in the Mojave Desert riding up a moderately steep hill and I ran out of talent. When that happens, sometimes things break. I really messed up my weekend this time. A very expensive helicopter ride to a trauma center and $115,000, and 2 years later I still can't work. I've got a rod the entire length of my right femur, 5 screws near my knee and one at the hip. The day after surgery they wanted me to leave but soon discovered that the other leg was broken as well. Just one large scar on the front of my right knee and a moderate scar on the side of my knee and a bit of a limp. It doesn't keep my from my photography, but I usually have trouble keeping up with normal people. I tell them to go ahead; I'll catch up. It gives me more time to see what I need to see and I usually capture more images than they do.
May 22, 2012 12:57:04 #
bikinkawboy
Loc: north central Missouri
Ran out of talent, I love that description. I've dumped my bike a few times over the years, but I wasn't talented enough to do that much physical damage. It's amazing how sometimes a seemingly insignificant action can result in such profound and lasting changes to one's life. Hang in there and give it your best.
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