lucky hack
Member
Using the figures on the Mamiya website I did some geometry and it seems that at the minimum focusing distance you can get an even tighter shot with the 80mm by a foot !
Is that possible? Does anyone have any experience getting a tighter shot with the 80 than the 150 at the minimum focusing distance?
Also, if there is anyone out there who wants to check my math I would appreciate it...
yes, I know I'm nerd.....try not to hold it against me.
hoping this message finds you well -Ian
Is that possible? Does anyone have any experience getting a tighter shot with the 80 than the 150 at the minimum focusing distance?
Also, if there is anyone out there who wants to check my math I would appreciate it...
yes, I know I'm nerd.....try not to hold it against me.
hoping this message finds you well -Ian
Attachments
ferider
Mentor
The minimum distances you give (i found different specs when googeling but might be wrong) translate to a covered object dimension of 46.2cm (for the 80mm lens) and 66.0cm (for the 150mm lens) for 6cm in the film plane, at minimum focus of each lens. So the 80mm lens enlarges more by factor 1.43
Roland.
Roland.
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lucky hack
Member
The more I try to figure this out, the more I'm confused
My numbers don't jive with the Max Magnification specs...
The maximum magnification is .097x for the 80mm and .096x for the 150mm. Could it be that the 150mm lens is further away from the film plane than the 80mm? (like macro extenders)?
The more I learn, the less I know. Now I know what my dad meant when he talked about knowing just enough to be dangerous.
Thanks for your reply, -Ian
My numbers don't jive with the Max Magnification specs...
The maximum magnification is .097x for the 80mm and .096x for the 150mm. Could it be that the 150mm lens is further away from the film plane than the 80mm? (like macro extenders)?
The more I learn, the less I know. Now I know what my dad meant when he talked about knowing just enough to be dangerous.
Thanks for your reply, -Ian
ferider
Mentor
Ian, I think your min. focus spec for the 80 might be wrong. Is this the same lens ?
http://www.epinions.com/Mamiya_80mm_f_4_0_Standard_Lens__Lens_215031/display_~full_specs
With those 39in (you used 27.4) the two lenses have almost the same magnification. Close to .09 with my formulas above but not identical to the numbers that you quote.
Also not sure what they are using to measure the magnification. Maybe the effective focal lengths are a bit different ?
Roland.
PS:
http://www.epinions.com/Mamiya_80mm_f_4_0_Standard_Lens__Lens_215031/display_~full_specs
With those 39in (you used 27.4) the two lenses have almost the same magnification. Close to .09 with my formulas above but not identical to the numbers that you quote.
Also not sure what they are using to measure the magnification. Maybe the effective focal lengths are a bit different ?
Roland.
PS:
Sounds like Faust ....The more I try to figure this out, the more I'm confused
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john_s
Well-known
From the manual for the Mamiya 7:
80mm lens, closest focus 1m, magnification at closest distance is 0.097
150mm lens, closest focus 1.8m, magnification at closest distance is 0.096
So neither will give a tight head shot.
80mm lens, closest focus 1m, magnification at closest distance is 0.097
150mm lens, closest focus 1.8m, magnification at closest distance is 0.096
So neither will give a tight head shot.
RObert Budding
D'oh!
You will get a very different perspective with the 150, though.
lucky hack
Member
Roland,
here's the site http://www.mamiya.com/mamiya-7-ii-lenses-standard-80mm-f4.0.html
what the Epinions website did was swap in the value for the 35mm equivalent by mistake. So I still don't quite understand but I guess that's alright too.
John,
(no tight headshot) I know, kind of a bummer. At least medium format negs are somewhat croppable...
Robert
Yeah, it's weird how it really changes the feeling, it places the viewer at a distance from the subject. Also I've found that when taking portraits, people are much more comfortable being photographed by a longer lens...
Thanks to all -Ian
here's the site http://www.mamiya.com/mamiya-7-ii-lenses-standard-80mm-f4.0.html
what the Epinions website did was swap in the value for the 35mm equivalent by mistake. So I still don't quite understand but I guess that's alright too.
John,
(no tight headshot) I know, kind of a bummer. At least medium format negs are somewhat croppable...
Robert
Yeah, it's weird how it really changes the feeling, it places the viewer at a distance from the subject. Also I've found that when taking portraits, people are much more comfortable being photographed by a longer lens...
Thanks to all -Ian
bensyverson
Well-known
This is just not the camera for someone who wants to do tight headshots. The RB, RZ, C220 and C330 are all great for this purpose, since they all have bellows and can focus extremely close.
2WK
Rangefinder User
I have seen some pretty nice tight headshots with the close-up adapter for the 80mm. Although it looks like somewhat of a hassle to use..
EdSawyer
Established
thoughts
thoughts
I think the 80 is the better lens for headshots. Neither is tight, but the 80 is easier to compose and focus, esp. if shooting wide open.
the close-up adapter is not really useful for tight headshots - it's too tight, you will end up with just a face, and slightly distorted perspective as well.
agreed re: RZ, et al. - they are much better for headshots, long telephoto shots, closeups, etc. The M7, while fantastic, does have a few limitations.
thoughts
I think the 80 is the better lens for headshots. Neither is tight, but the 80 is easier to compose and focus, esp. if shooting wide open.
the close-up adapter is not really useful for tight headshots - it's too tight, you will end up with just a face, and slightly distorted perspective as well.
agreed re: RZ, et al. - they are much better for headshots, long telephoto shots, closeups, etc. The M7, while fantastic, does have a few limitations.