The Kodak Brownie Twin 20

 

This attractive 620 film camera features both waist-level and eye-level viewfinders, hence the Twin part of the name.  The camera was produced from 1959-1964,  and you will often see it for sale in the box with flash, a space for batteries, and the space for a roll of film. The lens has an aperture of f/11, and there is zone focusing.  While there is no B setting, there are three apertures - EV13 - f/11, EV14- f/16, and EV15- F/22.  The shutter speed is approximately 1/100 sec.    The reflex viewfinder is very easy to use, and I find myself preferring it over the eye-level finder.  The camera came with a screw-on flash that uses AG-1 bulbs.  It's quite attractive and modern-looking, in that mid-century style.

I feel the zone focus and ergonomics are the principal attraction to this camera, and if it had B exposure along with a tripod socket, it would certainly rank among the top of my list.  I found that a press-on 33mm Series VI adapter fits over the front of the lens barrel, and allows me to use a yellow filter, which I feel is a great addition for skies.    

Remember to move the switch to Exp. 1-12 after loading the film 

and advancing to frame 1.

The only really oddball thing about this camera is that Kodak expects one to switch a lever on the bottom of the camera to "Load" when rolling on a new roll of film, until exposure 1 pops up in the red window.  Then press  the lever to Exposures 1-12 so that the wind-on stops exactly at the next frame number.  If you forget and start the wind-on in the 1-12 position, you'll never get it where you want it to be.  You then have to switch back to "Load" to get to the next frame number in the red window.  Might as well leave it on Load all the time.  Its sister camera is the Brownie Reflex 20, which has the same features, but lacks the eye-level viewfinder.   That one is definitely worth a try if you should see it in a shop somewhere.

Yellow filter attached with Series VI 33mm adapter

I took the Twin 20 out on an excursion last week to Spruce Pine, NC, and shot a roll of 1997 expired Tmax 400.  I have had good luck with this expired film, and used a yellow filter while shooting in the sun.  I developed it in HC110-B.  I am pretty happy with the results.  Zone focusing worked well, and I kept the aperture at f/11 on all of the shots.