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#1
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Exposure with macro lens
Hi, I'm waiting for the arriving of a Zenzanon macro lens, I've
ordered it and soon it will be here. I have a question. Because I've not an AE prism finder, how can I calculate the right exposure when lens is completely extended to have the maximum macro efffect? Are there tables for this? Thanks all |
#2
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Exposure with macro lens
exposure factor:
x=(m+1)*(m+1) "m" is an enlargement The enlargement you can count by means of the some ruler. object = 50mm image (on film) = 25mm exposure factor x = (0,5+1)*(0,5+1) = 1,5*1,5 = 2,25x you add 1 diaphragm number (e.g. from 5,6 on 4) All is okay? van piterengel napsal(a): Hi, I'm waiting for the arriving of a Zenzanon macro lens, I've ordered it and soon it will be here. I have a question. Because I've not an AE prism finder, how can I calculate the right exposure when lens is completely extended to have the maximum macro efffect? Are there tables for this? Thanks all |
#3
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Exposure with macro lens
I own a SQ-Ai. And I use a Gossen Lunasix. All is okay. Van
piterengel napsal(a): Hi, I'm waiting for the arriving of a Zenzanon macro lens, I've ordered it and soon it will be here. I have a question. Because I've not an AE prism finder, how can I calculate the right exposure when lens is completely extended to have the maximum macro efffect? Are there tables for this? Thanks all |
#4
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Exposure with macro lens
On 1 Apr, 13:17, van dark wrote:
I own a SQ-Ai. And I use a Gossen Lunasix. All is okay. Van piterengel napsal(a): Hi, I'm waiting for the arriving of a Zenzanon macro lens, I've ordered it and soon it will be here. I have a question. Because I've not an AE prism finder, how can I calculate the right exposure when lens is completely extended to have the maximum macro efffect? Are there tables for this? Thanks all Very useful. So, if I have a 1:1 macro, x=4 so I have to increase exposure of 2 stops. Right? Thanks |
#5
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Exposure with macro lens
piterengel wrote:
Hi, I'm waiting for the arriving of a Zenzanon macro lens, I've ordered it and soon it will be here. I have a question. Because I've not an AE prism finder, how can I calculate the right exposure when lens is completely extended to have the maximum macro efffect? Are there tables for this? Thanks all Very useful. So, if I have a 1:1 macro, x=4 so I have to increase exposure of 2 stops. Right? Have a look at this page: http://www.hasselbladhistorical.eu/HT/HTComp.aspx Don't let the theme of the site throw you off: the basic calculations are the same for all lenses. Only when you want to take lens asymmetry into account, you will need Bronica specific lens data. But the general formulae usually get you close enough, no worries. |
#6
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Exposure with macro lens
yes, all right. 2 stops. van
piterengel napsal(a): On 1 Apr, 13:17, van dark wrote: I own a SQ-Ai. And I use a Gossen Lunasix. All is okay. Van piterengel napsal(a): Hi, I'm waiting for the arriving of a Zenzanon macro lens, I've ordered it and soon it will be here. I have a question. Because I've not an AE prism finder, how can I calculate the right exposure when lens is completely extended to have the maximum macro efffect? Are there tables for this? Thanks all Very useful. So, if I have a 1:1 macro, x=4 so I have to increase exposure of 2 stops. Right? Thanks |
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