Recent content by hoohaaa

Let's hope they don't hang around here otherwise the cops are going be wasting their time.

I haven't followed the links above which may well be more helpful but I'd explain as follows. Consider a black and white image. Imagine that this image is produced using only 256 shades of grey between fully black and fully white. That probably allows for about 2 or 3 shades to be used for...

There's a price to pay for having more and smaller pixels (noise) and a limit to the number that are a benefit, so I doubt we'll just continue with ever more pixels. I suspect we're getting close to the optimum now.

This is very similar to the advice already given. Find a photo you like and that you could have taken (i.e. not a photo of the pyramids if you live in Basingstoke) and try to copy it. Study the photo for camera angle, depth of field, composition, lighting etc etc and try to imitate it. The...

I've got the f4 with IS. The IS can give about 3 stops extra and I often make full use of it (i.e. shooting at f4 with shutter speeds I wouldn't expect to be able to hand hold at). The 2.8 is only 1 stop better than the f4 so I'd say it's definitely something I'd want. Whether it's 'worth' it is...

I think you need more than a little trick. If you need to lose, say, 15lbs in 30 days that's about 1/2lb per day. That equates to roughly a shortfall of 1750 calories (3500 calories per lb). If you do 1000 calories of exercise a day and just eat about 1250 calories it might work but I wouldn't...

I thought the whole point of this (and the previous thread) was to make sure that anyone trying to learn about this stuff by visiting 'talk basics' doesn't get confused about just exactly what a crop sensor is. Jelster said that if you take a shot on 2 cameras with different sensors while...

Not again. There isn't a calculation to be done. Light from the lens falls on the film plane. A larger sensor collects lots of the image, a smaller sensor collects just the middle bit of it. Tell me how on earth the light passing through the same lens, aperture and focal distance can be...

In this case I think he's pretty much right. Yes, if you shoot in very low light, stuff that's miles away, or very small or a host of other not so unusual circumstances you'll need some extra kit. But if you're just getting started and want to take great pics but don't really mind what of...

I agree they do want to understand why. But explaining that to get the same image on a crop sensor camera will require a different lens and this will affect DoF comes closer to what I would call understanding rather than merely stating that sensor size affects DoF. Quite agree with that.

Well I agree that the statement 'if your camera has a smaller sensor you will usually have much more depth of field in your images' is an easy idea to grasp and remember but it doesn't help anyone to understand. For anyone trying to learn (and this is the talk basics forum) it just seems...

I think this is really the point (and the point of last weeks thread). In the scenario above you'd get a different FoV but the same DoF (ignoring sensor resolution and all that gubbins). However in the real world people do want to compare the same FoV so it is a convenient shorthand to say...

That's because DOF calculations are an approximation*. Go back to first principles and think about what's going on rather than what info an online DOF table asks for. The lens, particularly the aperture and focal distance, affect the blur circle. This is, as far as I can tell, the size the...

Wow, that's clever. I really wouldn't have thought you could be quite so certain about my motives. Oh, and I'm sorry about my wrong statements. I know you were king enough to point them out but while you kept letting me try to explain DoF and CoC etc you didn't really offer much in the way of...

My aim when I first pointed out that sensor size has no bearing on DOF was only to avoid confusion for the OP. I know it may appear to have an affect (because we change lenses to compensate) but it is a clumsy way of looking at it which leads to a lack of real understanding, especially when...