Lens data requested

The "MF" abd "MC" on these are fairly good signs that they are manual focus and likely "chip-less". I think it is fair to update the list for the chipless lenses with a lens ID of 65535 because that is likely what they would report as within a raw file...

my-spot wrote: my-spot wrote: 255          ???     Unpublished Lens I do not know what LensID 255 is... I seem to have found references to two lenses with a 255 LensID... Tamron SP AF 17-50mm F2.8 XR Di II LD Aspherical Tamron AF 55-200mm F4-5.6 Di II It would be great if somebody could double check the LensIDs if they have one of these lenses. Lenses with such differing specs usually do not have the same ID.

Regarding lens ID 255, I could find the following two references at "our place":

http://www.mi-fo.de/forum/index.php?showtopic=14914&view=findpost&p=213925
http://www.mi-fo.de/forum/index.php?showtopic=18627&view=findpost&p=213917

Both are pointing back at Dyxum as the source of information: ;-)

http://www.dyxum.com/dforum/forum_posts.asp?TID=21214&PID=210652

Hope it helps to track it down,

Matthias

Edited by Kiklop - 13 March 2008 at 12:40

I just tried to add some info in the Dyxum database regarding the Minolta AF Apo Tele Zoom 4,5-6,7/100-400mm, however, the software truncated the entry after my submission downto ca. 280 chars without giving me an error message. Hence, I would like to suggest to increase the allowed size of the entry somewhat and to add a proper error message when exceeding limits.

Anyway, in regard to the above mentioned lens, we were wondering, what might have been the reason of having two lens IDs (14 and 26441/2644), when there is only one known variant of this lens. I still cannot answer this, but it happens that we spotted and discussed a strange variant of this particular lens some while back in this thread:

http://www.minolta-forum.de/forum/index.php?showtopic=16770

Someone in our forum obtained a used lens from the UK (pre-ownership was not trackable beyond the immediate contact). This lens looks perfectly "normal", except for the fact that it sports a built-in bayonet-style tripod mount near the lens mount (or at least, that's what we think, it is). The finish of the metal mount is reported to look professionally made, not in any way like a user modification. So far, we have not been able to spot a second sample of this lens variant, nor have we seen the actual tripod collar, which would attach to this mount.
The lens has two stickers with Asian glyphs on them, one of them is reported to look like a QC sticker (white color with red/blue inking, oval shape). The serial number was 11500XXX, which might give some indication). In contrast to the "normal" variant of the lens, this sample did not have a 2-D barcode. The lens was made in Japan. It has 5 contacts and therefore is not a (D)-type lens. The lens mount itself has an inscription saying "© 1995 MINOLTA", just as with the normal Minolta AF Apo Tele Zoom 4,5-6,7/100-400mm.

Unfortuntely, the owner of the item sold it off to someone else already. The lens ID of this particular lens is still unknown (but we are trying to track it down).

Greetings,

Matthias

Edited by matthiaspaul - 11 December 2007 at 17:43

Got it -- Carl Garrard (Rush2112) did just over 2000 words and 11150 characters in the comments part of his review of the Sony AF DT 18-250mm F3.5-6.3. I presume that is enough for you?

brettania wrote: I presume that is enough for you?

That would be more than enough, thanks... ;-) Although I don't use Word.

However, I think, my explanation wasn't clear. I didn't meant the lens review comment section, but the comment entries in the Dyxum lens ID list at

http://www.dyxum.com/dAdmin/lenses/MakerNoteList_Public.asp?stro=lens

Greetings,

Matthias

In regard to the Minolta AF Apo Tele Zoom 4,5-6,7/100-400mm with tripod mount:

matthiaspaul wrote: Anyway, in regard to the above mentioned lens, we were wondering, what might have been the reason of having two lens IDs (14 and 26441/2644), when there is only one known variant of this lens. I still cannot answer this, but it happens that we spotted and discussed a strange variant of this particular lens some while back in this thread: http://www.minolta-forum.de/forum/index.php?showtopic=16770 [...] Unfortuntely, the owner of the item sold it off to someone else already. The lens ID of this particular lens is still unknown (but we are trying to track it down).

Okay, I just got confirmation, that the lens ID of this particular variant was 14. (What we don't know yet is, if lenses without this mount would have a lens ID of 26441 or mixed IDs.)

Greetings,

Matthias

albnok wrote: I'm not sure if this is an accurate guess, but for lenses of variable aperture F3.5-5.6 they seem to hit F5.6 at around half the longest focal length. Sony 18-70mm F3.5-5.6 DT - F5.6 at 35mm Sony 16-105mm F3.5-5.6 DT - F5.6 at 55mm Tamron 18-250mm F3.5-6.3 DT - F6.3 at 135mm If this could be proven, we could create a new rule of thumb!

This doesn't hold for the Tamron 55-200/4-5.6 (and probably the Sony version thereof) it holds f4 to about 120, f4.5 to 140, f5 to 180 and f5.6 from 180-200; similarly the Tamron 70-300/4-5.6 holds f4 to 135, 4.5 to about 200, 5 to about 270 ish 5.6 from about 270-300, difficult to determine the actual FLs between 180 and 300 as there are no markings on the lens, 4.5 definitely goes beyond the 180 marking and 5.6 is very close to 300.