Author Topic: Metering with Samyang  (Read 1500 times)

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Offline Gordon McGeachie

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Metering with Samyang
« on: October 15, 2017, 12:32:45 PM »
I have been wondering for quite a while about how you meter when using a Samyang manual lens on a DSLR.

Can anyone help?
A700, VG-C70AM, Sony 50mm f1.4,SAL1870, Sony 70-300mm f4.5-5.6 G SSM, A350,A550,3600HSD, Minolta 135, 500 Reflex, Sigma 10-20,  Tamron 17-50mm f2.8 XR Di-II LD ASP IF, Sigma 400, Tamron 90, ,Nissin Di866 MKII,Interfit 150w 2 head kit, Giottos MTL9351B/MH5011
My flickr site is here http://www.flickr.com/photos/35699306@N04/

Offline AScot

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Re: Metering with Samyang
« Reply #1 on: October 15, 2017, 05:56:50 PM »
Gordon, the camera does the metering, not the lens. You only have to do the focusing with a manual lens.

Or am I missing something in your question?
Sony A7, A850, A77, A700 || Sony>> 70-300G, 28-75 f2.8 SAM, 16-80CZ, 50 f1.4, FE 28-70 OSS, FE 24-70CZ f4 OSS, LA-EA4 || Minolta>> 300 f4 G HS, 200 f2.8 G HS, 100 f2.8 (D) Macro, 50 f1.7, 28 f2.8, 28-135 f4-4.5, 70-210 f4, 500 f8 Reflex, TC x 1.4 HS, TC x 2 HS. || Sigma 21-35 f3.5-4.2. || Tamron SP 24-135.

Offline Gordon McGeachie

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Re: Metering with Samyang
« Reply #2 on: October 17, 2017, 04:40:36 PM »
Gordon, the camera does the metering, not the lens. You only have to do the focusing with a manual lens.

Or am I missing something in your question?

I think I may be confusing myself, will have to think again and come back.

after thinking a bit more.......

If there is no chip in the lens, how does the camera know what the aperture range is?

Can you use automatic modes, or do you have to use manual exposure?

If using manual mode on the A350/550/700 bodies which have no auto ISO in manual mode, how do you get correct exposure?

Do you have to preset the aperture on the lens, then set that aperture in manual exposure mode

Its may be really simple, but I cant get my head around it.........




« Last Edit: October 17, 2017, 05:03:11 PM by Gordon McGeachie »
A700, VG-C70AM, Sony 50mm f1.4,SAL1870, Sony 70-300mm f4.5-5.6 G SSM, A350,A550,3600HSD, Minolta 135, 500 Reflex, Sigma 10-20,  Tamron 17-50mm f2.8 XR Di-II LD ASP IF, Sigma 400, Tamron 90, ,Nissin Di866 MKII,Interfit 150w 2 head kit, Giottos MTL9351B/MH5011
My flickr site is here http://www.flickr.com/photos/35699306@N04/

Offline AScot

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Re: Metering with Samyang
« Reply #3 on: October 18, 2017, 01:04:26 AM »
I was oversimplifying things by thinking of a non Sony/Minolta manual lens that was made to fit the A mount (or E mount). That's why I asked if I had missed something in your question.

If the lens you want to use is truly manual in every respect, does not have the 5 pins at the mount, but does fit the A or E mount (or with the use of an an adapter) then you are back to the days when cameras were all manual and had no meter. In those days, we had to use the Sunny sixteen rule or the Loony 11 rule. As you know in order to get the correct exposure you must balance three things, Shutter speed, Aperture and ISO. The focus is independent. Please google these two rules to find out how to use them, I simply do not have the time right now. Sorry Gordon. :| I will try and get back to you later.

Sony A7, A850, A77, A700 || Sony>> 70-300G, 28-75 f2.8 SAM, 16-80CZ, 50 f1.4, FE 28-70 OSS, FE 24-70CZ f4 OSS, LA-EA4 || Minolta>> 300 f4 G HS, 200 f2.8 G HS, 100 f2.8 (D) Macro, 50 f1.7, 28 f2.8, 28-135 f4-4.5, 70-210 f4, 500 f8 Reflex, TC x 1.4 HS, TC x 2 HS. || Sigma 21-35 f3.5-4.2. || Tamron SP 24-135.

Offline REX (aka TG)

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Re: Metering with Samyang
« Reply #4 on: October 18, 2017, 05:59:33 AM »
Gordon, the camera does the metering, not the lens. You only have to do the focusing with a manual lens.

Or am I missing something in your question?

Ascot is right the metering will be done by camera. Even it is full manual you will get TTL metering (Tthrough The Lens)

The contacts give information to camera
-what lens you use focal length for AS/IBIS
-to control aperture from camera electronically

aSLT/SLR/NEX,DYNAX

Offline Gordon McGeachie

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Re: Metering with Samyang
« Reply #5 on: October 18, 2017, 06:38:41 AM »
thanks guys, I have an old Pentacon 50mm f1.8 with an adaptor, will have to get out and play sometime
A700, VG-C70AM, Sony 50mm f1.4,SAL1870, Sony 70-300mm f4.5-5.6 G SSM, A350,A550,3600HSD, Minolta 135, 500 Reflex, Sigma 10-20,  Tamron 17-50mm f2.8 XR Di-II LD ASP IF, Sigma 400, Tamron 90, ,Nissin Di866 MKII,Interfit 150w 2 head kit, Giottos MTL9351B/MH5011
My flickr site is here http://www.flickr.com/photos/35699306@N04/