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So today in my photo class.... |
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02-16-2006
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#1
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Screw RC
Zack is offline
Join Date: Dec 2005
Location: Chicago
Posts: 103
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So today in my photo class....
I found myself in a very interesting argument that i felt i had to share, it goes like this.....
Instructor: What did you enlarge this at?
Me: 15 seconds at f/8
Instructor: Why dont you close down a whole stop to f/16 and make the time 30 seconds
Me: Sir f/8 to f/16 is 2 stops, f/11 is in the middle of those two
Instructor: er oh yeah thats what i ment
Me: and also closing down one stop is 100% less light and doubling the time is 100% more light so thats the exact same amount of light so that wouldnt do anything
Instructor: Nonsense the longer you leave it under the enlarging light the better your contrast
Me: are you sure?
Instructor: im positive
So then i went and did what he said and the prints came out the same.
Just a little comic relief.
Zack
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Fuji GSW690II, Konica S2, Pentax Digital Spotmeter, Wista DX with 135,270,360
"Calling yourself a photographer and using a Digital camera is like calling yourself a chef and using a microwave."
Go Bears!!! (2-0)
Last edited by Zack : 02-16-2006 at 18:07.
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02-16-2006
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#2
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Registered User
Scarpia is offline
Join Date: Nov 2003
Location: NYC and Warrensburg, NY USA
Posts: 724
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That's strange; you doubled everything. 
Kurt M.
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02-16-2006
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#3
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Registered User
Kin Lau is offline
Join Date: Aug 2004
Location: Ottawa
Posts: 1,689
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How much are you paying for this class?
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Of course I have a photographic memory: over exposed, under developed, grainy and out of focus
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02-16-2006
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#4
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Hold still, you're moving
Dracotype is offline
Join Date: Jan 2006
Location: El Cerrito, CA
Posts: 143
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He obviously was not a math major. That narrows the field a bit...
Maybe you should explain the exponential nature of shutter and f-stops to him. His brain might malfunction while trying to process it and your class would disband to happier things.  Maybe.
Drew
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02-16-2006
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#5
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Just live it.
RML is offline
Join Date: Apr 2004
Location: Amsterdam, Holland or Ulaanbaatar, Mongolia
Age: 43
Posts: 4,840
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Ouch!
Are you paying for that class?  |
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02-16-2006
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#6
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Screw Loose & Fancy-Free
Poptart is offline
Join Date: Jul 2005
Posts: 639
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I had a "professor" who quizzed the class about "What are the three types of filters one could use to protect the lens?" The answer: Skylight, UV, and Haze. It took some talking to convince him that UV and Haze are the same filter.
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02-16-2006
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#7
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Jon Claremont
ClaremontPhoto is offline
Join Date: Oct 2005
Location: Alentejo
Posts: 5,341
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The main reason for going for small f stop and long exposure when enlarging is to give more time available for dodging and burning. However, column shake is then an added problem sometimes.
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02-17-2006
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#8
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Moderator
rover is offline
Join Date: Jul 2003
Location: Connecticut
Age: 47
Posts: 13,860
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Jon beat me to it. It will also add to your margin of error as your precentages of exposure will become smaller.
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02-17-2006
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#9
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Jon Claremont
ClaremontPhoto is offline
Join Date: Oct 2005
Location: Alentejo
Posts: 5,341
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No, the percentages of exposure get *more* as your exposure time increases.
Fifty percent of 20 seconds is more than fifty percent of 10 seconds.
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02-17-2006
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#10
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Screw RC
Zack is offline
Join Date: Dec 2005
Location: Chicago
Posts: 103
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Since im still in high school it doesnt cost anything, i find that i have to pick my battles, if i tried to call him out on everything he did i would never get anything done. TOday i had to wrestle a squigi aways from him, he didnt understand that since it was old and since most high school kids are careless it was full of dust and dirt. He didnt seem to under stand that this would scratch the film. to solve this problem i just bring a sponge in a zip lock bag
__________________
Fuji GSW690II, Konica S2, Pentax Digital Spotmeter, Wista DX with 135,270,360
"Calling yourself a photographer and using a Digital camera is like calling yourself a chef and using a microwave."
Go Bears!!! (2-0)
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02-17-2006
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#11
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Registered User
FrankS is offline
Join Date: Aug 2004
Location: Great White North
Age: 56
Posts: 17,159
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While it is the goal of a true teacher that their students' skills and knowledge eventually surpass their own, this sounds more like a sad case of incompetence.
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“Believe nothing, no matter where you read it or who has said it, not even if I have said it, unless it agrees with your own reason and your own common sense.” – quote
I myself am made entirely of faults, stitched together with good intentions. -quote
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02-17-2006
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#12
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Moderator
rover is offline
Join Date: Jul 2003
Location: Connecticut
Age: 47
Posts: 13,860
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Quote:
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Originally Posted by Jon Claremont
No, the percentages of exposure get *more* as your exposure time increases.
Fifty percent of 20 seconds is more than fifty percent of 10 seconds.
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I think we are saying the same thing in the end. A 2 second error is a bigger error with a total exposure of 10 seconds than it is with an exposure of 20 seconds. |
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02-17-2006
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#13
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Registered User
Little Prince is offline
Join Date: May 2005
Posts: 406
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Yeah I guess it didn't come out right when you were talking about percentages. Also using smaller apertures allows you to fine tune your exposure by doing more test strips near your correct exposure.
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02-17-2006
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#14
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Registered User
Kin Lau is offline
Join Date: Aug 2004
Location: Ottawa
Posts: 1,689
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Quote:
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Originally Posted by FrankS
While it is the goal of a true teacher that their students' skills and knowledge eventually surpass their own, this sounds more like a sad case of incompetence.
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Sounds like a high-school teacher who became the "photography teacher" because he was the only one who actual knew something, not that he was trained for it, or was good at it.
Reminds me of my Auto-Mechanics teacher. The HS was short of teachers, so the teacher from Tech-shop (tech is tech right?.... wrong) who's a welder, and who knew less about cars than most of us did, taught the course. Same thing with my "physics" teacher, who was normally the biology teacher. His grasp of physics was also similarly ...urm.... "inadequate".
__________________
Of course I have a photographic memory: over exposed, under developed, grainy and out of focus
<a href='http://www.rangefinderforum.com/photopost/showgallery.php?cat=500&ppuser=583'>My Gallery</a>
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