Based on specifications and considering only Ghetaldus King cameras, the Regula L seems to be an updated and upgraded Regula IIIa. The lens is still a triplet Ghenar, however, it's 2/3 of the F stop faster with a maximum aperture of F/2.8. The viewfinder has bright frame with a parallax correction mark and is bigger, which looks nice but has a downside in form of a significantly darker view. The shutter moved from the top plate to the lens barrel. The film reminder is still located on the film rewind knob while an exposure counter was moved to the bottom plate of the camera. Film advance and shutter cocking is performed by a lever hidden to the camera body.
|Regula L (GRL100 variant) looks somehow more modern with it's clean top and shaped lens plate.|
- Viewfinder camera
- Bright fixed frame in the viewfinder
- Ghetaldus Zagreb Ghenar lens F/2.8 45 mm
- 3 elements 3 group
- Minimum aperture: F/16
- Pronto shutter
- 1/250 to 1/30 s + B
- Self timer
- Flash synchronization
- Weight: 478 g
- 125 × 65 × 85 mm
I still couldn't resist to acquire one of this "Ghetaldus Munchen" Regulas just for sake of comparing it to the closest Zagreb Regula L. What I figured out is that front body metal plate design is significantly different (higher profile).
|Front body metal plate design: left "Ghetaldus Munchen", middle GRL100 and right GRL200.|
"Ghetaldus Munchen" has red 10 and 3 meters engraving on the distance scale while GRL 100 and GRL 200 have all white and additional 20 m engraving. General distance style is different among all three in decimal number size. Munchen Regula uses decimal point while GRL100 and 200 use decimal comma.
|Distance engraving styles: left "Ghetaldus Munchen", middle GRL100 and right GRL200.|
Bright Frame FinderRegula L has a variant of the reverse Galilean viewfinder called bright frame finder. Framing assist lines, shaped by the metal mask, are projected to the viewfinder with a help of an ordinary and a semi transparent mirror.
|Regula L (GRL100) viewfinder construction.|
GRL100Older style of Regula L body - less leatherette, more metal. Bold font on the film memo dial with straight top on the number "3". Bright colored exposure counter set knob. Probably constructed mainly from metal parts. Pronto shutter.
|GRL100 on the left and GRL200 on the right.|
|Regula L GRL200 variant|
|Viewfinder assembly. Left GRL100, middle GRL200 and on the right Ghetaldus Regulette.|