on every lense for SLR is like trigger. when you are attaching lens to the its pulled- so apereture hole is wide open. ats unpulled only when you are taking a picture. i've tried to pull a trigger on the lense(you can see it on the video), but nothing happened- hole is still closed. another thing...
(less)
when the shutter is not presed apereture should be wide opened- as wide as its possible. only when shuter is pressed and mirror goes up apereture shiuld be closed to the defined number. in this lens(pentax lens 75-150mm) this happends, but with vivitar lense is not. so when we set apereture to m...
(less)
Safe Search Filter is ON. Truveo understands that some content may not be appropriate for all users. We provide a Safe Search Filter so that you can choose the content best suited to your personal interest. Turning OFF the Safe Search Filter may display content that is only suitable for viewers over 18 years of age. Click the button below if you are over 18 and would like to turn OFF the Safe Search Filter.
