That plastic dome on lenses. What does it do?

Recent Classifieds

Forum statistics

Threads
178,675
Messages
2,457,845
Members
94,604
Latest member
Hammad
Recent bookmarks
0

Hamster

Member
Joined
Jan 5, 2006
Messages
202
Shooter
Med. Format Pan
On a lot of SLR lenses, there is a small plastic dome near the lens mount. For instance, the red dome on Minolta and Leica lenses, white dome on Pentax Lenses or blue dome on Zeiss.

I have read somewhere that it is referred to as a "finger point". Is there any functional value to this dome? I always thought it was there for marketing purposes only.
 

Lee L

Member
Joined
Nov 17, 2004
Messages
3,280
Shooter
Multi Format
On Zeiss and Leica it aligns with the lens mounting release lever on the body, allowing you to mount the lens by feel, matching up a finger or thumb on the lens dot with a finger or thumb on the camera body. You can change lenses in the dark or without looking (as in keeping an eye on your subject). If you learn to use your equipment correctly, the raised dot is highly utilitarian. If not, it's considered an affectation. :smile:

I'm not saying the other brands don't work the same way, I haven't used them.

Lee
 

Anscojohn

Subscriber
Joined
Dec 31, 2006
Messages
2,709
Shooter
Medium Format
On a lot of SLR lenses, there is a small plastic dome near the lens mount. For instance, the red dome on Minolta and Leica lenses, white dome on Pentax Lenses or blue dome on Zeiss.

I have read somewhere that it is referred to as a "finger point". Is there any functional value to this dome? I always thought it was there for marketing purposes only.
******
It allows matching up the bayonet mount by feel when changing lenses.
 
Photrio.com contains affiliate links to products. We may receive a commission for purchases made through these links.
To read our full affiliate disclosure statement please click Here.

PHOTRIO PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Ilford ADOX Freestyle Photographic Stearman Press Weldon Color Lab
Top Bottom