Tang Shooters LXXXIII - TCSS Thread...

[juste_millieu]

I have seen that thread...
and it is very confusing in a sense that it is not easy to understand optics.
We are cool, just friendly discussion nia..

For a same lens ( say 50mm ), if you mount onto different body, you are only seeing part or portion of the image circle produced from this lens.

imagine a portrait shoot.
Scenario 1:
all standing the same distance away from the subject
using medium format will let you shoot a full body of the subject with 50mm lens
using FF format will let you shoot half body and
using cropped sensor will let you shoot head and shoulder only.

The amount of bokeh is the same when all is using the same F-stop and because distance from lens to subject is the same.

Scenario 2:
medium format is standing 3m from the subject and is shooting full body of the subject.
FF format is standing 5m from the subject and is also shooting full body of the subject.
cropped sensor is standing 8m from the subject and is also shooting full body of the subject.

The amount of bokeh is different when all is using the same F-stop. Because the distance of the subject is different. When your subject is nearer to you, you tend to produce better bokeh ( this is optics ). This can be easily felt when you are shooting macro..... the macro subject is so close to your lens and even at F16, slightly mis-focus and your subject is blur already.

Yeshz...blazy bbbuttie, the specified Circle of Confusion for a crop @ 1.6 = 0.019mm and FF ish 0.03mm, and based on the formula for DOF calculation,

Dn= s(H-f) / H+s-2f
Df = s(H-f) / H-s

where H = Hyperfocal distance calculated based on the circle of confusion. Hence there is an advantage in the FF with regards to background blur...

thankx billy thankx camel... i go back read...
cant read now else for sure i fall in sleep in office :bsmilie:

 

[zh3ng]

for the first time, TCSS got into some serious photography technical discussions!!

 

[mayngbt]

I have seen that thread...
and it is very confusing in a sense that it is not easy to understand optics.
We are cool, just friendly discussion nia..

For a same lens ( say 50mm ), if you mount onto different body, you are only seeing part or portion of the image circle produced from this lens.

imagine a portrait shoot.
Scenario 1:
all standing the same distance away from the subject
using medium format will let you shoot a full body of the subject with 50mm lens
using FF format will let you shoot half body and
using cropped sensor will let you shoot head and shoulder only.

The amount of bokeh is the same when all is using the same F-stop and because distance from lens to subject is the same.

Scenario 2:
medium format is standing 3m from the subject and is shooting full body of the subject.
FF format is standing 5m from the subject and is also shooting full body of the subject.
cropped sensor is standing 8m from the subject and is also shooting full body of the subject.

The amount of bokeh is different when all is using the same F-stop. Because the distance of the subject is different. When your subject is nearer to you, you tend to produce better bokeh ( this is optics ). This can be easily felt when you are shooting macro..... the macro subject is so close to your lens and even at F16, slightly mis-focus and your subject is blur already.

thanks for sharing. :thumbsup:

 

[juste_millieu]

for the first time, TCSS got into some serious photography technical discussions!!

i know camel, billy n king james is serious one :bsmilie:
and i wont surprise if tonight c camel post some sample of his test :sweat:

 

[blazer_workz]

I have seen that thread...
and it is very confusing in a sense that it is not easy to understand optics.
We are cool, just friendly discussion nia..

For a same lens ( say 50mm ), if you mount onto different body, you are only seeing part or portion of the image circle produced from this lens.

imagine a portrait shoot.
Scenario 1:
all standing the same distance away from the subject
using medium format will let you shoot a full body of the subject with 50mm lens
using FF format will let you shoot half body and
using cropped sensor will let you shoot head and shoulder only.

The amount of bokeh is the same when all is using the same F-stop and because distance from lens to subject is the same.

Scenario 2:
medium format is standing 3m from the subject and is shooting full body of the subject.
FF format is standing 5m from the subject and is also shooting full body of the subject.
cropped sensor is standing 8m from the subject and is also shooting full body of the subject.

The amount of bokeh is different when all is using the same F-stop. Because the distance of the subject is different. When your subject is nearer to you, you tend to produce better bokeh ( this is optics ). This can be easily felt when you are shooting macro..... the macro subject is so close to your lens and even at F16, slightly mis-focus and your subject is blur already.

Good explaination! :thumbsup:
Scenario 2 sounds logical to me...:think:

 

[blazer_workz]

Yeshz...blazy bbbuttie, the specified Circle of Confusion for a crop @ 1.6 = 0.019mm and FF ish 0.03mm, and based on the formula for DOF calculation,

Dn= s(H-f) / H+s-2f
Df = s(H-f) / H-s

where H = Hyperfocal distance calculated based on the circle of confusion. Hence there is an advantage in the FF with regards to background blur...

:thumbsup: u r the man! gotch formula oso!
Dr jawzsg! :thumbsup:

 

[mayngbt]

Yeshz...blazy bbbuttie, the specified Circle of Confusion for a crop @ 1.6 = 0.019mm and FF ish 0.03mm, and based on the formula for DOF calculation,

Dn= s(H-f) / H+s-2f
Df = s(H-f) / H-s

where H = Hyperfocal distance calculated based on the circle of confusion. Hence there is an advantage in the FF with regards to background blur...

this camel is prof camel

 

[zh3ng]

DOF not mean Depth of Females meh?

If you stand nearer to a female wib big boobie(aperture), the more you will stare(focus) at the boobie only resulting in all other things to be blur (bokeh).

the bigger the boobie, the more bokeh u get.

 

[juste_millieu]

DOF not mean Depth of Females meh?

If you stand nearer to a female wib big boobie(aperture), the more you will stare(focus) at the boobie only resulting in all other things to be blur (bokeh).

the bigger the boobie, the more bokeh u get.

:sweat:

 

[juste_millieu]

zheng buttie, today so bz har?
didnt c u login msn oso

 

[zh3ng]

zheng buttie, today so bz har?
didnt c u login msn oso

ohhh. no leh. haha i forgot to on. haha.

 

[Redsun]

DOF not mean Depth of Females meh?

If you stand nearer to a female wib big boobie(aperture), the more you will stare(focus) at the boobie only resulting in all other things to be blur (bokeh).

the bigger the boobie, the more bokeh u get.

quote 1st for ronger to see

 

[zh3ng]

quote 1st for ronger to see

harlow rs korkor :sticktong

 

[juste_millieu]

quote 1st for ronger to see

good morning ronald.... have u decide which backpack to bbb? :bsmilie:

 

[lkkang]

DOF not mean Depth of Females meh?

If you stand nearer to a female wib big boobie(aperture), the more you will stare(focus) at the boobie only resulting in all other things to be blur (bokeh).

the bigger the boobie, the more bokeh u get.

poison too deep liao :sweat:

 

[Jimmy81]

DOF not mean Depth of Females meh?

If you stand nearer to a female wib big boobie(aperture), the more you will stare(focus) at the boobie only resulting in all other things to be blur (bokeh).

the bigger the boobie, the more bokeh u get.

Stare too long will get a palm mark on ur face :bsmilie:

 

[zh3ng]

Stare too long will get a palm mark on ur face :bsmilie:

then your mind will go gong gong and see stars. This we call Overexposed. :bsmilie:

 

[Redsun]

good morning ronald.... have u decide which backpack to bbb? :bsmilie:

lol going cp to see

 

[Pauche]

battlestar galactica - human
[youtube]d9J73h80KbI[/youtube]

battlestar galactica - cyclon
[youtube]dyH0pGzIg-0[/youtube]

 

[Pauche]

tonite gotch fireworks at USS!!!
http://disneyandmore.blogspot.com/2010/03/universal-studios-singapore-fireworks.html