Shutter Speed Measurements: Pentax (K-1, K-3, Q7, *istD) and Canon (G15, Rebel XS)

swanlefitte · 05-23-2021, 10:43 AM

Originally posted by Digitalis

The curtains are made of strong but low mass materials that can withstand acceleration and stopping forces without substantial deformation.

The video also shows how using 3 thin strips allows for sping and flex to absorb the abrupt deacceration.
Very interesting.

**Digitalis** · 05-23-2021, 10:33 PM

Originally posted by swanlefitte

The video also shows how using 3 thin strips allows for sping and flex to absorb the abrupt deacceration.

Flexing of the shutter blades was a big problem with shutters in early cameras, dividing the shutter up into three segments allows for movement that would be damaging for a single sheet of material. Titanium was used in some upper tier cameras but it was still a rarity in the past due to the difficulty of fabricating and machining it. Light Composite materials such as Carbon fiber and Kevlar are much more common now.

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05-23-2021, 10:43 AM	#16
swanlefitte Pentaxian Join Date: May 2015 Location: Minneapolis Photos: Gallery Posts: 4,068	Originally posted by Digitalis The curtains are made of strong but low mass materials that can withstand acceleration and stopping forces without substantial deformation. The video also shows how using 3 thin strips allows for sping and flex to absorb the abrupt deacceration. Very interesting.

05-23-2021, 10:33 PM	#17
Digitalis Site Supporter Join Date: Mar 2009 Location: Melbourne, Victoria Photos: Gallery Posts: 11,694	Originally posted by swanlefitte The video also shows how using 3 thin strips allows for sping and flex to absorb the abrupt deacceration. Flexing of the shutter blades was a big problem with shutters in early cameras, dividing the shutter up into three segments allows for movement that would be damaging for a single sheet of material. Titanium was used in some upper tier cameras but it was still a rarity in the past due to the difficulty of fabricating and machining it. Light Composite materials such as Carbon fiber and Kevlar are much more common now.