Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: About how many feet from the subject does this flash work?
Document: I love taking pictures with Nova. I was initially hesitant at buying Nova since my cell phone has a built in flash. The problem with the built in flash is simply too harsh on the subject; meaning it drains the natural colors and facial features.The best way I can describe Nova is a gentle light source that really preserves the features of the subject. It's also slim enough that you can keep it in your pocket without it getting in the way.
When you press the test button, it lights up night and bright. It appears the issue is that the flash turns off too early, as in before the capture of the image.As to why this has 5 stars, I'm not sure. Perhaps people using it have little idea how it should work? But the whole point of a flash is to light something, and this does not.
I really hate to dump on this product, but as it stands now, it's a total waste of money. The developer of it was asking me to send him photos as examples of it working incorrectly, however he never bothers to follow up, but he seemed like a nice guy.The issue is, if you expose for the background, and try to use the Nova as you would a real flash it does not work.
App works great to sync with Nova Camera flash on my ipad air. Remember to keep it charged and it is very useful in various lighting situations.
Nova is rad! I avoid my built in flash because the results are ghastly. I now enjoy using flash with Nova. Simple, compact and amazing results.A photographer recommended it to me and now I recommend the Nova to you!
I downloaded the app, opened it and took a picture. There's not even an on button. More gadgets should be designed like this- really simple hardware with a well designed mobile app driving it. Waaaay easier to use than the radio flash I've got.
This would fix all of the issues, they wouldn't have to pretend to be app designers, and it would be far cheaper to produce and sell without the Bluetooth capabilities.There's a huge opportunity here if they can vastly improve the software in a hurry. If they don't, it's going to be another flash in the pan (pun completely intended).
I got this via the Kickstarter, and have been having fun with it so far. I do, however, have a couple of semi-serious gripes that you should be aware of.Color temperature: They advertise the flash as producing cool to warm tones, but (at least on mine) it more like warm and warmer, even the coolest setting is not remotely close to daylight, which limits it's usefulness in a lot of settings (like softening shadows in the shade).
I love this thing. I was a little bit skeptical when I first ordered it, but boy was I happy with the result. This really makes a huge improvement to the quality of my photos. The warm tones of the flash make people look really good (instead of the white ghostly image I usually expect from a flash). It's small and looks good.What I like:* The photos taken with it look good. Really good.
A neat solution to the searchlight-in-the-face effect from camera phone flashes being right next to the lens. A bajillion other creative uses.I'm a (very) amateur photographer so I've got a DSLR that I love. I mostly use my phone on nights out when I can't carry a bigger camera. Being in a restaurant or bar or walking around at night is exactly when I wish I had my off-camera flash and I never have it with me.
Answer: That's going to depend on how dark the subject is. It works great at arms length. 12 feet as the other commenter said? That would be pushing it I think. Maybe as a minor fill light, but not as a primary light.