What is the difference between this flash and the TTL version of this from the same brand? Which one is more recommended for a beginner photographer?

TTL allows the camera to automatically adjust the flash to light needed. The Neewer is manual as Robert said. So keep this in mind when using your camera metering to set shutter speed. The camera may say the exposure is low for your shutter speed. For regular indoor people shooting, just keep your shutter speed at 1/180th sec and manually adjust flash as needed and or adjust ISO and Aperture for desired look and exposure. I use 5 of these, I generally set the power to 1/4 power on flash. Shutter speed to 1/180th sec f/3.5-f/4.5 and keep my ISO between ISO400-ISO2400 on the 6D using a 70-200 f/2.8 lens. With TTL the camera is taking into account there is a flash so the metering is adjusting for that when you are using the camera. Just make the adjustments so you are getting good even shots, look at your histogram of the sample shots and preview in LCD window. Shooting in manual mode is just a little different and a little practice to get the hang of it. Also there is no high speed sync, so depending on the camera you can't shoot faster than 1/200 sec or 1/180 sec or you will get a flash sync line in copy if shooting faster. 1/180th sec is perfect for wedding and reception posing. If shooting outdoors in bright light, consider an ND Filter so you can open the shutter for nice bokeh and DOF. Other wise go with a flash that has high speed sync so you can shoot up to 1/8000th second. Hope this is helpful. You can do a lot with these inexpensive manual flashes, you just need to learn them.

Can this flash be fired by the Canon 60D internal flash control off camera?

Yes. The 60D uses the Canon E-TTL flash system which fires a pre-flash to test exposure. You can set the TT560 to ignore this pre-flash. You won't get flash metering control via the camera, but it can trigger these flashes off camera. However, my own testing shows this flash only outputs 40% of the claimed power, so be aware of that issue as well.

Does it work with Nikon d3200?

It works with my Nikon D70s in "M" mode (Manual). It does not work with the "A" mode (Aperture).I think for D3200, Neewer VK750 II i-TTL flash might be a better choice.

How come it works inside as a slave but not outside?

If the flash is towards the front side of the camera, turning the sensor part of the flash (red panel on front) towards the camera may help. Also you can try to up the power of the on-camera built in flash. Holding a small bounce card in front of the on-camera flash to reflect light towards the slave flash may also help. If nothing works, then you need to invest in RF trigger/receivers.

ASIN	B004LEAYXY
Batteries	4 AA batteries required.
Best Sellers Rank	#2 in Shoe-Mount Flashes
Customer Reviews	4.5 4.5 out of 5 stars (12,888)
Date First Available	January 29, 2011
Is Discontinued By Manufacturer	No
Item Weight	3.52 ounces
Item model number	TT560 Flash
Language	German, German, German, German, German
Manufacturer	Neewer
Product Dimensions	4 x 8.7 x 3.15 inches

TT560 Camera Flash Speedlite Compatible with Canon Sony Nikon Panasonic Olympus Pentax and Other DSLRs, Compatible with Sony ZV1, NOT for ZV-1F, Speedlight with Standard Hot Shoe Mount

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