Discussion Forum for various Lenses of different major labels in a shared environment at Photography In Malaysia

1. From : rick (rick_oleson@yahoo.com)
Url : http://rick_oleson.tripod.com
Date : 08:12 AM Thursday 05 October, 2006

Hi Samuel:

I have notes for disassembly of both the earlier "breech lock" style and the later "bayonet" style (my notes on the bayonet are for the f/1.8, but I think the 1.4 will be similar in construction). I will send them to you if you will email me for them.

However, I would think carefully about this. Dust specks in a lens cause no harm and have no effect on your photos. In addition, the chances are that when you get it back together it will still have dust specks in it, possibly more than it has now, unless you have a clean-room environment for the work. And this assumes that you manage to get it apart and back together correctly without losing any pieces or damaging anything... which is not guaranteed. If your lens is working properly and you can't afford a professional cleaning, I would just keep using it.

2. From : rick (rick_oleson@yahoo.com)
Url : http://rick_oleson.tripod.com
Date : 08:07 AM Thursday 05 October, 2006

Hi Stefano:

The blades are probably oily from lubricant migrating out of the focusing threads, and have gotten stuck together. A professional cleaning is the best solution for this, and it shouldn't be prohibitively expensive for this nice of a lens.

3. From : Samuel B Sagcal (samuel_sagcal@yahoo.com)
Url : http://
Date : 05:18 AM Thursday 05 October, 2006

Hi to All, I still have my Canon A-1 cameras and with the 50mm,1.4FDLens. However, there is no any repair shop for cleaning the dust inside the lens and am planning to do it myself as long as there is instruction manual for disassembling and assembling the lens.
Could somebody out there help me on this one as cant afford yet to buy a new one and really i my old camera. Hope to hear from you there.

Thanks,
Samuel

4. From : Stefano (stefano_papini2003@yahoo.it)
Url : http://
Date : 09:39 PM Wednesday 04 October, 2006

Hi all, I have a beautiful Carl Zeiss MM Planar 50/1,4 whose blades don't close. The lens, once detached from body, doesn't "stop down" even with aperture rings set to values higher than the maximum (1,4). The lever for open/close the aperture moves but doesn't move the blades. Have you got any idea of how to fix it? (anyway I can use it always at 1,4...) Kind regards, Stefano Stefano

5. From : Dave (Davethirtyeight@yahoo.com)
Url : http://
Date : 06:29 AM Wednesday 04 October, 2006

I have a Canon lens for the L1 video camera that I have obtained, and cannot find any info on these. Can anyone direct me to a site or have any info on these? Canon doesn't have anything that I could find. The lens is a CL 8-120mm VL AF-Macro 15X
Thanks in advance

6. From : Luigi D. Sandon (cp@sandon.it)
Url : http://
Date : 10:03 PM Tuesday 03 October, 2006

Adam: the T50 was designed to work in programmed mode only. It is not an aperture priority camera. When the lens is not set to A, it sets the flash synch speed (1/60) only, therefore images could be underexposed/overexposed easily if you don't set the aperture accordingly!!! It won't give you any warning but the flashing M, telling you you're on your own.
If the lens fits the camera, probably it's an FD compatible lens with an "A" (auto) setting. It is past the minimum aperture (probably f/22 on your lens), it could be the "A" letter or a small circle. Usually you have to press a button to set the lens on the auto setting.
If you have questions about the camera, please use the T camera forum.

7. From : rick (rick_oleson@yahoo.com)
Url : http://rick_oleson.tripod.com
Date : 11:15 AM Tuesday 03 October, 2006

Hi Adam: Removing the lens should not cause any problems, the shutter is closed and the mirror is down covering it for a bit of extra protection. Don't do it in bright sunlight though, some light might sneak by around the edges. You should be able to just attach the lens and go. Most Canon cameras are designed to work most conveniently if you set the lens to the "Auto" position (either a letter "A" or a dot at the end of the aperture scale beyond the largest number) and then the camera will control the aperture for you. You can set it manually to an aperture number setting as you are doing, (then the "M" will light in the finder) but in most Canon A and T series cameras it is less convenient to get your exposure set right this way. I am not familiar with the T50 in particular.

8. From : Adam (adampaycheck@yahoo.com)
Url : http://
Date : 10:26 AM Tuesday 03 October, 2006

Thank you for the info Luigi. I downloaded the book and it pretty much says everything you said. I'm fairly new to this whole thing, so thank you for everything.

Some follow-up questions: Because I have this aftermarket lens, do I need to do anything more to take photos other than just putting it on? I mean do I have to adjust the aperature settings or anything like that since it's not auto-aperating?(sp?)Right now I am using 400 speed film with the aperature set at 4.5.

I was also told that as long as I wasn't in the process of taking a photo that I could take off the lens, which I did. Did I ruin my whole role of film by doing so?

Again I appreciate all the info!

Adam

9. From : Luigi D. Sandon (cp@sandon.it)
Url : http://
Date : 02:55 AM Tuesday 03 October, 2006

Matthew: yes, stopping down will help, because you will be "using" the lens edges no longer.

10. From : Matthew Newton (azazel1024@hotmail.com)
Url : http://
Date : 09:10 PM Monday 02 October, 2006

I guess I should probably take my time before I post in the future. I did a little poking around and this doesn't seem to be an altogether rare problem, especially with zoom lenses, and especially with ones that are not top top of the line. The lens is pretty large (67mm filter attachement) if that matters. Something that was recommended on some websites for some lenses with known vignetting problems (also goot if I spell the word right) is to stop down the lense a bit by an F-stop or so.

Anyone with experience with lens that have some minor vignetting know if this might help?

Thanks.

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