It depends on where are you uploading your pictures. Irrespective of the place, you watermark must be small enough not to cover much of your photo. You can keep your watermark mostly around bottom corner.  

There are basically three fundamentals that you should follow for photography. Those are

1. Shutter Speed
2. Aperture
3. ISO / Film Speed

You can find a nice article on this fundamentals over here

But before that, you need to practice on Program Auto or Auto Mode (Creative Mode on Canon) for clicking in perfect composition. When I bought my camera, the sales guy suggested me to start with the only composition, rest you can master later. 

Here are some photo composition tips by Steve McCurry - The famous photographer

1. Shooting with 50mm lens can let you shoot at aperture as wide as 1.8 but a 18-55mm will allow you to shoot only at 5.0 aperture 
2. This difference itself is a huge deal. This means you can have the advantage of having faster shutter . Imagine shooting handheld at 1/15s with aperture f5.0 and then at 1/125s with aperture f1.8. This can be significant in low light conditions.

For someone who is really new to photography, here are some basic tips we would suggest you need to follow and implement.

1. Know all about your camera. Features and all the buttons on your camera.
2. Know about the exposure triangle.
3. Practice holding your camera the right way.
4. Practice focusing, composition, and framing.

We have detailed blogs for topics related to guide beginners in photography.

Related Blogs.

Tips on how to use the new camera

Exposure triangle for beginners /Understanding exposure triangle. What is it? How do you use it?

5 Essential camera settings every newbie must know

Diwali season is on. Time to shoot some amazing fireworks. Have you ever tried earlier?

I use my gears Nikon D750 with 24-120mm lens to capture fireworks. I used the kit to shoot fireworks last year. One of my few clicks are attached with my post. Few things that are must for shooting fireworks:

• Any camera which can exposure for couple of seconds, say 1 sec or more.
• Having a tripod is beneficial to keep the camera sterdy and align along any direction.
• Having a wired or wireless shutter release will allow you to trigger the camera without disturbing camera.
• Right location. It's utmost important factor. You must know where are you going to get fireworks. I prefer to shoot at my terrace. I can point the camera in any direction.

One more point which may seam difficult for most of us but very important is the patience. If you are trying fireworks for first time, it will be little challenging for you so all you need to do it to keep patience while clicking.

Coming to settings, there are no ultimate settings but keeping camera exposed enough in time will allow you to shoot fireworks so shutter speed must be 2 sec or more. If you are not really sure about how long should you keep the camera open, you can keep 5 sec or more depending on amblient lights around. If amblient light is low, you can keep much lower shutter speed. It will allow you to capture any moment in the sky.

Aperture would be good if I keep 5.6 or higher in number. If you still believe that you are getting very low intensity of fireworks, open the aperture. Reducing shutter speed here will not help. Keeping lower shutter speed will bring light trails in the image. So if you are getting good trails but low light intensity, need to widen the aperture.

Similarly if you are getting light intensity too high, need to reduce the aperture. It will cut down the extra light. 

Let me know if you have any points to mention to discuss. Do post your questions in follow up posts.

In any lens, elements are the specific lens pieces used and how are they arranged to obtain a particular feature, the arrangement is the group. Lenses pieces are usually arranged in groups. In lens, say if it is a zoom lens, it will have more number of elements and groups, where as for a prime lens, it will have less number of groups and elements. 

Usually it is termed as the more number of groups and elements, the better the quality but it is not always true. Lens quality also depends on the type of glass, design mechanism, manufacturing process of the lens. So for a particular focal length, a prime lens would be better than the zoom lens.

Prime lenses usually perform better than zoom lenses.

First question is that how do you understand if a lens is of high quality and will produce quality DOF (better DOF).

I'd like to explain DOF as not dependant on lens quality but dependant on aperture number (f-number). Usually low f-number lenses are expensive like 85mm f/1.4 is pretty expensive than 85mm f/1.8 costlier. f/1.4 lenses are also termed as better quality lens due to their internal structure.

Let's try one thing. Keeping ISO and shutter same, shoot at f/2.5 with 85mm f/1.4 lens then shoot with 85mm f/1.8 lens. DOF will remain almost similar irrespective of the cost of the lens. But if you want to produce even better DOF with either lens, you will have to shoot at f/1.8 on 85mm f/1.8 lens and shoot at f/1.4 on 85mm f/1.4 lens. Now you will find you the background is very much smooth in that image which was shoot at f/1.4 on 85mm f/1.4. So the reason is lower f number produce better DOF.

DOF is not the only reason to buy expensive prime lenses. There are other factors as well:

1. f/1.4 lens will be fast than f/1.8 lens.

2. Ideal for low light situation.

3. Better quality image.

If you find above points reasonable to invest large amount, can go with it. I don't think so until you buy lenses, can try new lenses at shop. Though you can get them all on rent for a day to experiment if you like the performance. Then you choose to go with.

If I'm hobby photographer, I'd prefer to go with f/1.8 lens as it saves a lot.

Reply for more queries on the topic.