Lighting and teleconverters

Hi Guys,

Further to my discussion involving the 60mm micro and the 1.4 teleconvertor.

When a teleconvertor is added to a prime or variable lens, I have read that various amounts of Fstops are lost depending on the size/magnification of the teleconverter. Now to counter this perceived/actual loss of light to the sensor, do I or should I, increase the power of the strobe lighting to compensate?

Thanks for taking the time to help out the little colonial,

Bruce...

it does rob 1 stop. you can either open up your aperture one stop (since we don't shoot macro wide open) or increase your strobe exposure. with digital you can just shoot and review so its no problem unless you're carefully calculating flash exposure. then its more complicated, cause you get one less stop at same subject distance, but you will also be at a higher magnification at said distance and therefore have less DOF, so you may want to stop down more then you def need more strobe etc..... though we're hardly shooting macro at full strobe so it shouldn't be a problem. you can just move your strobes in closer too.

For every stop of light taken away by the converter, you need to double your strobe power.

If you're using a Nikon compliant teleconverter (which you probably aren't) then it will show the actual f-stop in your viewfinder. Otherwise, you need to calculate it yourself.

Cheers

James