I am interested in how to calculated DOF with a 180 macro lens so I can determine how much to move a focusing rail. If the focal length was truly 180, then it would be simple. But I have heard when a macro lens is focusing close, the focal length is actually much shorter than when the lens is focusing at infinity.
There have been several (at least, perhaps more) on equipment insurance. What about business insurance (professional liability). If someone get hurt by your equipment, etc. I don't want to be held personally responsible.
Any suggestions? I am think of doing a bit of work, not full time, but never the less, what to make sure I am covered.
With spring nearing, I am thinking that I would like to get use a focusing rail to help my macro work. Ideally it would be great to have a motorized setup, but with the need for power (batteries) that would make the rig too large to take to the field.
Next best would be a stepping rail with some sort of gear knob to allow me to move the camera in fine increments.
I set my 1Dx to AEB (firmware v2.0.3) in manual exposure mode.
According to the manual, the camera should adjust the shutter speed. What I observed is that the camera adjusts whatever is on the main dial. When I have the aperture control on the main dial, it is adjusted. When I have the shutter speed on the main dial, it is adjusted.
Is something wrong with my camera/firmware or is the quirk in the firmware?
Looking to understand how my flash works. Like how does high speed synch work in detail- for example, what is the number of times it flashes at different shutter speeds, why does it go into high speed synch at 1/250 in Av mode but not M mode.
Looking to buys diffuser for my 600-ex flash. I have looked at the lumiquest and honl and there seems to be a lot of to choose from. Like most products, reviews are mixed with some people pointing out the diffusers slip and other to mentioning a problem.
I am looking for a soft box attachment for the Canon 600-series flash. I need this device to (1) travel well and (2) e stable on the camera. Ideally I would not like to attach velcro glue strips to the flash but realize that these may be the best way to secure the soft box attachment.
I am thinking of buying the new Mac Pro (2013) for Photoshop work. Wondering what configuration is "best" for PS and LR cc.
4 vs 6 cores - leaning towards 6 cores 32 GB Ram - occasionally work on files with large number of layers or 16x48 pans. Total size on disk is top 2GB. GPU - base 300 or upgrade to 500? Monitors will be current spectra view 25" and 23" (not 4K)
Nearly zero video editing
does this make sense? What about the GPU? Recommendations?
I notice Sandisk has introduced a new Extreme CF card - package is gold. This could be old news, but wonder how fast these cards are compared to the Extreme Pro CF card (VPG-20 vs VPG-65) in a Canon 1Dx.
Either fires the camera based upon sound or when the beam of light is blocked, hopefully has an adjustable delay. I imagine capturing a drop hitting the surface of water, balloon exploding, egg exploding, ...