Radar 12" F6.3?

[Ari]

Was probably etched on a Monday morning, that's all.

[Mark Sawyer]

Weird. An Ilex #5 has a 63mm maximum iris...

Remember that the front cell can magnify that aperture to a significantly larger size.

[BarryS]

Remember that the front cell can magnify that aperture to a significantly larger size.

Right--my point is that if the Alphax doesn't reduce the maximum aperture, the Ilex shouldn't.

[Jim Galli]

Give front and back a penlight test. Usually the f6.3 was entry level and was a dialyt type. 4 glass in 4 groups, which is deadly for flare if uncoated. If you get 4 brights, front and back that's what it is. Wolly did the same thing. It was a cheap lens to get the entry participant up and going. The 4.5 Radar barely fits in a 5 Betax. I think the Ilex was a bit smaller yet. Sure it isn't an Ilex 4? 12" 6.3 was common in Betax 4.

[koh303]

Give front and back a penlight test. Usually the f6.3 was entry level and was a dialyt type. 4 glass in 4 groups, which is deadly for flare if uncoated. If you get 4 brights, front and back that's what it is. Wolly did the same thing. It was a cheap lens to get the entry participant up and going. The 4.5 Radar barely fits in a 5 Betax. I think the Ilex was a bit smaller yet. Sure it isn't an Ilex 4? 12" 6.3 was common in Betax 4.

Now that you ask if i am sure if it is in a #5 shutter, i am not so sure any more. Wait let me see, if it says universal no. 5 shutter its a #4 right?
Jim, you solved the mystery.

[Jim Galli]

Now that you ask if i am sure if it is in a #5 shutter, i am not so sure any more. Wait let me see, if it says universal no. 5 shutter its a #4 right?
Jim, you solved the mystery.

I deeply regret that I honestly tried to help. Trust me, it won't happen again. Ahhh, the ignore list.

[mdarnton]

Quite often on Ebay I see lenses that have been transplanted to a different shutter without changing the f-scale. If you have a barrel lens and a shutter that fits, this is an obvious thing to do. Then making the scale is left to the person who does the graft, and I guess a lot of people don't bother. This happens often enough that I always check the scale on lenses I am thinking of buying to make sure the shutter is scaled right. It's very common on old American lenses and I've seen a few 90mm W/A Raptars with f/4.5 scales, and I have a black 15" tele Raptar in a shutter with an f6.3 scale--it was so cheap I couldn't ignore it :-)

You can often recognize these jobs from a barrel that doesn't match the shutter. Just recently there was an obvious transplant on Ebay. Someone grafted a 14-3/4" Ilex Paragon from a barrel into a #5 shutter. The barrel is black from a barrel lens, the shutter chrome. Then he called it a 14-3/4" Caltar, which it obviously wasn't and didn't look like at all. It's in the "sold" listings, and I wonder if the buyer realizes what he got.

Anyway, making a correct scale isn't that hard.

[koh303]

Quite often on Ebay I see lenses that have been transplanted to a different shutter without changing the f-scale. If you have a barrel lens and a shutter that fits, this is an obvious thing to do. Then making the scale is left to the person who does the graft, and I guess a lot of people don't bother. This happens often enough that I always check the scale on lenses I am thinking of buying to make sure the shutter is scaled right. It's very common on old American lenses and I've seen a few 90mm W/A Raptars with f/4.5 scales, and I have a black 15" tele Raptar in a shutter with an f6.3 scale--it was so cheap I couldn't ignore it :-)

You can often recognize these jobs from a barrel that doesn't match the shutter. Just recently there was an obvious transplant on Ebay. Someone grafted a 14-3/4" Ilex Paragon from a barrel into a #5 shutter. The barrel is black from a barrel lens, the shutter chrome. Then he called it a 14-3/4" Caltar, which it obviously wasn't and didn't look like at all. It's in the "sold" listings, and I wonder if the buyer realizes what he got.

Anyway, making a correct scale isn't that hard.

Please explain how this is related in any to the lens in question?
The lens and shutter both marked for f6.3.

[Jim Galli]

Instead of asking ignorant questions, why not make a rough measurement of the entrance pupil with something like, oh, a ruler, and divide that number into the presumed focal length, or perhaps you could measure that at infinity too but that might be a challenge for you, and then you could answer your own dopey questions and stop being rude to people in your tone.

[koh303]

It is 2.7".
This brings up the question of why the lens is so marked - is it because of the available shutter markings? It seems that i would be the same trouble to re etch the lens as it would the shutter...???

actually, it is 2.5" or 64mm.
305/64=4.7....