请帮看一下这个库克镜头

燃烧的晚霞

请帮看一下这个库克镜头,是什么年代的?求指导,

zhkehui

133mm焦段。

燃烧的晚霞

zhkehui 发表于 2018-5-2 07:55
133mm焦段。

是啊,看了照片我感觉好像是中画幅胶片机上的人像头,不知道对不对?英文名称:Taylor Taylor Hobson 5.25 inch / 105mm Wide Angle f6.5 Lens with mounting ring,翻译软件一下为:Taylor Taylor Hobson 5.25英寸/133mm广角F65镜头，带有安装环.

zhkehui

133在45上算是标准镜头了。如果在8*10上会不会算是广角？但相场不知道有没有这么大。

燃烧的晚霞

zhkehui 发表于 2018-5-2 08:24
133在45上算是标准镜头了。如果在8*10上会不会算是广角？但相场不知道有没有这么大。 ...

感谢指导!是啊,

hurst

Hobson Wide Angle Anastigmat series VII B made in England. Full opened covers whole plate 6,5 x 8,5 inch at infinity with no vignetting.

hurst

图上的相机应该是6.5X8.5英寸机器，133毫米镜头在上面可以算广角。

hurst

http://www.allenrumme.com/lensdb/Wide%20Angle.html
这里有个广角镜头表，可以查，这个镜头在F16时视角达到90度。

hurst

Re: Cooke series Viib 5 1/4 (133mm)
Hi Wenbiao,

Two things: did you check out the info pages of Seth's cameraeccentric.com? He has a brochure of Cooke lenses online and your lens will be in it.
Another things: I copied the following out of the LVM, maybe it helps?

Series V11b EISTAL f6.5/f11 This was the 'new' Gauss version to overtake the V11 and was f6.5 to focus and f16 or less to shoot. It seems to have been introduced early in the 1920's, certainly by 1924. It was made typically in 63-222mm in 1935, and the shortest was for 6x9cm as on the 'Envoy' camera post WW2 (see B.J.A. 1951, p487 advert.), and this size could have actually been added later than 1935 or been in intermittent supply- it is there in B.J.A. 1928, p606 for example. Series VIIb covers 90°at f16 and 100° at f32 and these apertures were suggested for use over these angles. A lens No12,49x at 4.5in was used on 1/2plate. Normally 6.25in was used for 10x8 and 135mm for 1/1plate. Some were coded ANGLIC, probably in later lists, and it was made coated after WW2 and into the 1950's. It was seen at No 125,08x uncoated
4.18in, and Nos 310,39x in 5.25in; and 382,41x and 459,60x in 4.25in, these being coated lenses. These are fairly common coated ('a hard durable coating') as they were wanted postwar by professionals, and sold well:
many are front mounted in Compur shutters, but this may be by repairers, rather than by TTH themselves as there is no mention of this in the advert. (see also Envoy). Results with these today can still be excellent if in good condition as they are sharp and contrasty. They may be the best of the Gauss lenses of this general type. It still featured in the last advert. noted in B.J.A. 1955, p495 as follows:
2.5in 63mm 4.25x3.25in at f16.
This was offered for many years prewar but were not always listed postwar. It was used on the Envoy wide angle camera however. (B.J.A. 1926, p650). One point may be that purchase tax was levied on ** products which were sizes up to and including 6x9cm, and this part of the market was therefore unduly expensive since it was a heavy tax burden for a product to carry.
3.25in focus 82mm for 5x4in at f16 1.25in flange
4.25in 108mm 7x5in 1.25in
5.25in 133mm 8.5x6.5in 1.25in
6.25in 158mm 10x8in 1.5in
8in 203mm 12x10in 1.75in
8.75in 222mmm 14x11in 2.25in This was in 1931, not in 1929 or postwar.
Note that the lens was rated for these formats when used at f16, for 90°, at f32 it covers 100°. The coverages seem the same in 1929 as in 1955.

So, your lens is a Gauss lens, was intended for 8.5x6.5in at f16 and someone must have been happy enough with it to put it in that Ilex shutter. Be glad, now you have the lens in shutter and you do not need to go out and find one. Enjoy, sounds like a great lens.

hurst

上面是大画幅论坛上的，综合下，这个镜头是“新”高斯结构，建议用F6.5取景对焦，用F16拍摄。最先著录于1920年代，一直到二战都有生产。有人用在8X10相机上。看起来是个好镜头，好好用吧