Alley in Pisa, Italy

by Lars Kotthoff

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0
votes
1answer
100 views

How do I focus at a specific distance (in meters)?

When I use the manual focus mode, I usually adjust it until the object I care about comes into focus. But sometimes the object is not there yet, so I'd like to know if there is a way for me to tell ...
7
votes
4answers
291 views

How much does a drop in temperature affect focus?

In an answer to question "What lens characteristics are important in astrophotography?" there was mentioned "If the temperature changes drastically, you may need to refocus as different materials in ...
4
votes
3answers
3k views

How can I find infinity focus on a kit lens with no markers?

I have a kit lens which has no markers. What would be a recommended way to find infinity focus on this lens? I plan to shoot objects at night -- not necessarily stars or the moon. So, adjusting the ...