Hello everyone.Ihave a question on a post regarding the use of a 100mm lens?Any help would be appreciated.A fellow diver says he uses a focus light with the 100mm lens,any suggestions on which would be adequate?Second,he claims he always uses the built in focus lights for close up macro shots which is what?and finally,he always uses spot focus with this lens which again I am not sure of.Thanks for any help
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100mmlens
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There is a similar discussion going on here:
http://wetpixel.com/forums/index.php?showt...indpost&p=65017
You should find answers to your questions there.
Cheers,
Mat
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Hello everyone.Ihave a question on a post regarding the use of a 100mm lens?Any help would be appreciated.A fellow diver says he uses a focus light with the 100mm lens,any suggestions on which would be adequate?Second,he claims he always uses the built in focus lights for close up macro shots which is what?and finally,he always uses spot focus with this lens which again I am not sure of.Thanks for any help
Hello drstevie
Spotting/focus lights are very helpful when shooting macro with long lenses. The thread Mattdiver referred you too goes into detail on this.
In regard to the built in focus light the other diver mentioned I would guess that he was referring to a light built into his strobes. However, My S2 camera has a focus assist light which I can actually use in some cases due to the large diameter of the Aquatica flat port.
Spot focus basically means the camera will focus on a very small area within the center of the frame. These days, many if not all DSLR cameras have multiple ( spot ) focus points that the user can select.
"Spot" focus is useful for macro shooting due to the limited depth of field you have. In reality it give you the best control of the camera focus in most situations. there are other mode like "dynamic focus " which will track your subject and keep it in focus.
you should refer to your camera manual for what focus modes you have available.
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Spot focus basically means the camera will focus on a very small area within the center of the frame. These days, many if not all DSLR cameras have multiple ( spot ) focus points that the user can select.
Just as an illustration, there are 5 focus points shown on the image below (the five brackets [] )
On most "prosumer" and dSLR cameras, you can easily select which point will be used for focus using the navigation keys at the back of the camera, This is very useful as a composition tool.
Cheers,
Mat
