Why does the f-stop get stuck on 4.5 when zoomed way in?
I think you misread the specifications. Your lens is an f2.8-4.5 variable aperture zoom. At 17mm its an f2.8 but when you zoom to 70mm it becomes an f4.5.Sigma offers an 18-50mm f2.8 constant apert...
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Why does the chlorinator stop functioning when you stop using the pool vacuum cleaner?
Why does the CIA keep well zoomed satellite imagery from civilians?
The technology itself is a matter of national security, and is disseminated on a Need to know basis. That being said, most civilians have no Need to Know.
When you come to a stop sign, is a rolling stop considered stopping at the stop sing?
Epson R265 wont stop printing, seems stuck in a loop-How can i cancel it?
turn off the printer,(unplug it if you have to) go to control panel > printers, open up the printer and make sure the spool is empty, restart the PC to