Skip to main content

Difference between TTL and manual mode for flash photography

My recent love for doing DSLR photography using external flash has made me do a lot of experiments in past 2 weeks. In this post, I am going to talk about the two important working modes of an external DSLR flash unit. This post will summarize the working of each mode of operation and which one to prefer based on your subject, lighting, etc. The mode of operation of an external flash photography is classified into two main types:

1) TTL 

2) Manual

TTL: Through the lens. Canon DSLR models have E-TTL whereas Nikon ones have i-TTL for the same mode.



When to use: Indoor photography with rapidly changing lights, fast movement, changing angles, distance variation from the subject, etc. are some major factors where e-TTL comes to rescue. It is not convenient to adjust the flash power every time in order to take a shot just because lighting changed. What would happen? The shot that you wanted to take might be gone by the time power is adjusted. If you are going to change aperture or shutter speed as well, try to stick with TTL. I usually like to keep TTL flash on my camera hot-shoe. 

Manual and TTL flash shooting mode

Manual: Like the word itself says, this mode involves setting the power manually. 



When to use: Outdoor portraits, studio portraits, off-camera flash. This mode of external flash operation works really well when a user has full control over the subject and lighting. Example: Studio portrait photography. 



Bad side: For me, the only inconvenient thing was multiple physical movements required to adjust power. Not an issue anymore, there are cheap third party remotes easily available these days. 


Pro tip: 

1) Variation of f-stop in DSLR photography controls flash exposure, whereas shutter speed controls ambient light.

2) The manual changing of flash power and zoom level can be done by using optical or radio-based triggering. 

If you found this post helpful, share the photography love by sharing this post:)

Comments

Popular posts from this blog

sRGB vs Adobe RGB colour space explained

Digital images are everywhere, both offline and online. Each digital image is made up of a large number of square sized individual pixels. Zoom into an image at 2000 % or more in any of the viewers, you will see these pixels. Here is an example:


In order to categorize pixel colours, RGB and CMYK are the two widely used colour models. According to the RGB colour model, each pixel colour can be considered as an addition of different shades of red/green/blue light. These light shades are calculated according to the bit depth of the image. Jpeg images are usually 8 bits per colour channel (red, blue or green), which means 2^8 ( 256) different shades of each red/blue/green colour are possible. Few examples to make it clear how different colours shades are represented:
Red: (255, 0, 0)
Green: (0,255,0)
Blue: (0,0,255)
White: (255, 255, 255)
Black:  (0,0,0)



What does CMYK do? It is a subtractive colour model for printing purposes and stands for Cyan, Magenta, Yellow and Black. According to …

5 things to know before switching DSLR between Canon and Nikon

Photography is an expensive hobby or profession and everyone wants the best bang for every dollar they spend. This applies to any photography equipment starting with low-cost tripods to super expensive professional grade lenses. I am sure all of us must have heard of Nikon and Canon. The good old battle between these two DSLR brands will never end. Whether you are a beginner or a full time professional, there are a few quirks everyone should know before switching camera between these brands.
1) The used market for Canon gear is just enormous which makes a good plus point for investment and buying decent used gear. Go to craigslist for a given city and search used photography gear, the difference will be easily noticeable. I searched for 10 different cities in Canada and all had comparatively more listings for Canon.
2) Nikon has better dynamic range cameras. Dynamic range is the ability of the camera to sense the lightest and darkest scene in a given photo retaining as much detail as…

How to locate the milky way for night sky DSLR photography?

Our Earth is part of a huge sized galaxy, known as the Milky Way. Milky Way basically consists of our whole solar system and is made up of 100-400 billion stars. Until last year, I had no idea if we can see Milky Way with naked eyes. After a lot of failed late night drives and sleeping at the beach, I was finally able to get a grip on what I actually need to see Milky Way. In September 2016, I got my first Milky Way shot. It was an extremely emotional and priceless moment when I first saw the magnificent milky way with my own eyes. All the failed attempts or discomfort of not going to bed early seemed nothing in that moment. I would consider sharing this priceless memory with fellow photography folks as the inspiration behind this post.  Moving on to the technical part, there is a minimal amount of gear required to take Milky Way shots using your dslr. Focusing at infinity and calculating the shutter speed to avoid star trails is purely technical, capturing Milky Way takes a little mor…