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WEB-SITE Updated.7th.Aug.2018

 

                

 

       

               Digital Imagery Interest Group 

 

Next Mtg. 9th.Aug. 2018 

       Date : 2nd. Thurs. Monthly- 9:30 to 11:30

 

 

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DIGITAL IMAGERY SIG 12 JULY 2018      REPORT         FLASHLIGHTS

Brian Smith used a trip to the Press Building and his online research to bring forward a lot of issues about using flashlights when taking photographs.

Most people in the digital imagery group use the built in flash on their cameras. Various points were raised that would help get the best out of this type of flash. These included:

 ·         Using a wider aperture, longer shutter speed and consider what ISO to use.

    ·         Checking there is no shadow at the bottom of the picture with shorter focal lengths (the example of 18mm on a zoom lens was used).

·         The light from popup flash lights can be very harsh when used as a fill flash. However one member has successfully reduced by reducing the amount of light delivered by the flash to the lowest level.

From the photos Brian took using an on camera SB600 Nikon flash on his trip around the Press building he demonstrated the following further properties of flashlights.

 ·         Light from a flash diminishes by the square of the distance

·         There is ‘through the lens metering'. Need to remember that the light is reflected back into the camera which affects the amount of light the flashlight delivers

·         Use flashlight on an angle to reduce glare. Brian also demonstrated using a piece of white paper attached to the top of the flash so that it extended forward of the flash to reduce reflected glare.

The following aspects presented on a website by Nasim Mansurov were discussed: (https://photographylife.com/how-to-get-the-best-out-of-your-pop-up-flash)

 ·         Diffusing light

 ·          Using a pop up flash as fill flash

·         Through The Lens (TTL) flash light in Nikons and other DSLRs. The Flashlight gives a very fast preflash in order to adjust main flash

       ·         DSLR Curtain Sync Modes

       ·         Using Popup flash as Flash Commander

Finally, Brian demonstrated various defusers and reflectors. Defusers are placed on the front of the flashlight. Gold reflectors give a warmer light; a silver reflector is harsher than a white one. The effects of the relative speeds of flash and shutter speeds on the foreground and the background of the photo were discussed.

Judy Kirk 14/07/2018

 

 

   

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