how long is the life span in one can? like how 3-4 times before its out?

This is relative to room size and thickness and dispersion containment. If applied for film use for atmosphere- (this is not a fog machine) you will get avg 7 -10 scenes shot in a 12x12 contained room... think base applying in camera talent area and then some small retouches.. again this is relative.

How long does it stay in the air?

Approximately 3 1/2 minutes per spray

How long does the haze last in the air before its too thin? 5 minutes? How many cans would you need to do a 20minute video shoot to get rays of light?

It is highly dependent on the environment you are in. If you are in a controlled studio with no ac vents blowing, it can last quite a while. If you're outside and the wind is blowing you will probably need to spray continuously. I wouldn't shoot a video with less than 6 cans on hand. Thanks! Enjoy the Atmosphere. https://www.youtube.com/watch?v=TBr-nfuk7hg

ASIN	B08N5BTTX7
Batteries Included	No
Batteries Required	No
Best Sellers Rank	#153,161 in Car & Motorbike ( See Top 100 in Car & Motorbike ) #1,360 in Spray Cans
Brand	Atmosphere Aerosol
Compatible Devices	Any device capable of capturing images or videos
Customer Reviews	4.4 4.4 out of 5 stars (656)
Date First Available	10 June 2021
Has Auto Focus	No
Has audio recording capabilities	No
Includes Rechargeable Battery	No
Item Dimensions LxWxH	20.1 x 6.4 x 6.4 Centimeters
Item Weight	635 g
Item model number	Fog Spray
Manufacturer	Atmosphere Aerosol
Model	Fog Spray
Model Name	Aerosol can
Product Dimensions	20.07 x 6.35 x 6.35 cm; 635.03 g

Atmosphere Aerosol 2 Pack 8oz Haze/Fog Spray for Photographers and Filmmakers

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