OP
OP
SLR with correct flange focal distance as a reference
If the flange focal distance is correct, the SLR has done everything it can to ensure that infinity is sharply focused. If this is not the case, the lens is the suspect.
To check whether a lens has the correct infinity stop, it is checked under the autocollimator. Now it can be adjusted precisely.
In the third step, the camera's focusing system can be checked with the SLR and lens adjusted. This is because what is displayed and imaged sharply must also appear just as sharply in the viewfinder.
See also
www.photrio.com
+++
A word of caution
Please keep in mind that you’ll be using highly flammable solvents for service work, and their fumes are harmful to your health. Soldering also produces fumes that should not be inhaled. Dangerous high voltages can be present when handling electronics, especially in conjunction with electronic flash units and mains. Therefore, familiarize yourself with the safety regulations beforehand and ensure your safety. Depending on the activity, protective gear may be advisable.
All information provided without guarantee and use at your own risk.
Acknowledgments
Without the work of Master Larry Lyells, in particular, we wouldn’t have the detailed technical information we need today for service/repair of SLRs.
The SPT Journal and The Camera Craftsman, which he helped shape significantly as an author, and which contain all the necessary information and instructions are available for a fee through Learn Camera Repair.
We owe our access to them to Eugene Pate, the founder of Learn Camera Repair.
If the flange focal distance is correct, the SLR has done everything it can to ensure that infinity is sharply focused. If this is not the case, the lens is the suspect.
To check whether a lens has the correct infinity stop, it is checked under the autocollimator. Now it can be adjusted precisely.
In the third step, the camera's focusing system can be checked with the SLR and lens adjusted. This is because what is displayed and imaged sharply must also appear just as sharply in the viewfinder.
See also
Checking the focusing system of an Olympus OM-4. Definition of a workflow for checking and adjusting sharpness
In several articles, we have discussed the flange focal distance. the infinity focus of lenses, and the autocollimator. We concluded that the flange focal distance of an SLR must first be verified through measurement. If this is correct, an objective lens on this SLR can be adjusted to infinity...
www.photrio.com
+++
A word of cautionPlease keep in mind that you’ll be using highly flammable solvents for service work, and their fumes are harmful to your health. Soldering also produces fumes that should not be inhaled. Dangerous high voltages can be present when handling electronics, especially in conjunction with electronic flash units and mains. Therefore, familiarize yourself with the safety regulations beforehand and ensure your safety. Depending on the activity, protective gear may be advisable.
All information provided without guarantee and use at your own risk.
Acknowledgments
Without the work of Master Larry Lyells, in particular, we wouldn’t have the detailed technical information we need today for service/repair of SLRs.
The SPT Journal and The Camera Craftsman, which he helped shape significantly as an author, and which contain all the necessary information and instructions are available for a fee through Learn Camera Repair.
We owe our access to them to Eugene Pate, the founder of Learn Camera Repair.
