All Forum Comments
Comment by alex_s posted on Crop factor confusion at 30/06/2007 - 21:42
Macros do tend to be insanely sharp, see my thread from a month or two ago on hockey shots...
Apparently, it'll be a good while before anyone needs to make a decision on actually buying a 35mm macro, anyway. I'll have come up with a better reason to get one by then, I'm sure. Like doing macro photography, for example.
I once used a Photoshop trick on someone else's "brutally honest" portrait, where you made a fairly transparent blurred copy of the red channel and blended it on top using Luminosity mode. Lots of detail, but a sort of hazy glow (it's subtler than it sounds). Great for crows feet. Kind of thing I hope a good camera, excellent lenses and a bit of experience will render unnecessary.
Comment by alex_s posted on Crop factor confusion at 29/06/2007 - 07:07
A 50mm would make a nice portrait lens on digital, and they can be had for not much money.
Comment by alex_s posted on Crop factor confusion at 29/06/2007 - 06:46
A portrait is normally a picture of the head, or head and shoulders. 35mm is much too wide because, if you fill the frame, the perspective (even on a DSLR) will give an unnatural and usually unflattering result.
The 77mm is a superlative portrait lens because although it is as sharp as you could wish, it has a creamy quality that is flattering to the skin.
Comment by alex_s posted on Crop factor confusion at 29/06/2007 - 06:31
Sounds like I need to start a new piggy bank now, just to be redy when the time comes...
Comment by alex_s posted on Crop factor confusion at 28/06/2007 - 22:27
Gwyn wrote:
I use my 90mm macro lens as a portrait lens too.
Isn't that a bad idea because it can be a little too sharp?
Would that work? Or will old people shun me after seeing their portraits?
Comment by alex_s posted on Crop factor confusion at 28/06/2007 - 22:24
I regularly used a 135mm lens on my Super A, I found it really good for more informal/candid shots of the kids as they were growing up.
Now if the pointing on the gable end can just hold out for another couple of years...
Comment by alex_s posted on Crop factor confusion at 28/06/2007 - 20:08
To fill the frame with the same subject and a telephoto you would obviously be much further away, hence the apparent perspective change is due not to the lens but the distance.
Try it and see.
So if I did get this amazing 77mm lens, I'd always be further away from the subject with a digital camera than with a film one (for a given shot), and the perspective of the shot would indeed be quite a bit flatter? Sigh.
Which means that the question I should really have been asking was, is 120mm too long for doing portraits? Sorry to grind away here, but it's an expensive lens, and my pointing and shooting up to now has been mostly outdoor stuff.
Comment by alex_s posted on Crop factor confusion at 28/06/2007 - 18:57
After many false starts over the last couple of years, with something urgent always coming up before I took the plunge, it looks like I'm finally getting a camera this summer (and the K10D looks to be a bit of a silver lining to the whole business...).
I've also been pleasantly surprised to see that, instead of me going through all the crippling indecision and lack of sleep over what lens(es) to buy, Pentax don't seem to do duff lenses. And only offer ones you might actually find useful. And two from my wish list (the 35mm macro and the long zoom - weatherproofing being what led me here in the first place) haven't even been made yet. Bliss. And the posts on this forum have been a real help, BTW. Thanks.
There's just one thing keeping me up late, and it's a question about prime lenses. I understand that with digital sensors, the view you get is cropped by about a third, so you think of it as having a focal length about 1.5 times longer. But what about perspective? For example, is the perspective you get from e.g. the 77mm Limited (which I might just be able to afford) on a digital camera the same as you'd get from a full-frame film camera? It's just that 120-odd mm seems a little long for portraits.
I realise this isn't strictly a Pentax question (and I'm not strictly a Pentx user yet, either) but could anyone help?
Comment by alex_s posted on Crop factor confusion at 28/06/2007 - 17:54


TBH I think you could do worse than stick with the kit lens until you get used to the camera and discover just what you really need in the lens line up.
Although I'm certainly going to try and get the short DA* zoom (and then the longer one when it comes out), rather than the kit lens, but this is a question of how long stuff lasts, rather than how it performs. Without weatherproofing, I'm going to find outdoor opportunities pretty limited for much of the year, at least for the kind of things I want to photograph - curtains of torrential rain sweeping down the hillside towards me, huge hailstones bouncing off stuff in all directions, you get the point...