hefty1

Joined: 28th June 2007

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hefty1
Quote:

Try drawing it on a piece of paper. The image circle projected by a lens is always round as the lens is round (sometimes there are internal baffles to make a square aperture on say the M 100mm F4 but lets ignore this).

Now draw a rectangle in the box, not a square, make sure that the corners touch the edge of the circle. Draw it like it was your camera with a long top and short sides. If you've drawn it in the proportions 3 * 2 for instance you will see that the sides are much closer to the edge than the top and bottom. The top and bottom are not using the extreme edges of the image circle whereas the sides are. The performance of a lens is always better in the center than the corners. As you get further from the middle the quality decreases.
I concur, however, the argument was that the edge-to-edge sharpness was different depending upon which orientation the camera was held in - *that's* the bit that I contest as nothing changes in the relationship between lens and sensor regardless of the position you take a photo in. Except in this case it looks like it does, as the particular lens in question has a wobbly barrel which seems to be moving from shot to shot - the extra sharpness in landscape mode seems to be down to pot luck as it looks like that was when the lens elements "fell into place" (quite literally!). Under normal circumstances (ie without a broken lens) I still maintain my original point holds true...

Comment by hefty1 posted on Which lense?? at 14/06/2008 - 22:23

hefty1
Quote:
More to the point, can you get an adaptor for an AF 140C ringflash?

Dan
I think I just heard Frankie Howard turning in his grave...

Comment by hefty1 posted on Which lense?? at 11/06/2008 - 22:58

hefty1
Quote:

As for the people at DPReview, it's not true that they don't like Pentax equipment. They use these all the time to do what they are best at:

http://www.endoscope.com/End_Detail.asp?ProductID=3073&type=&Catagory=&a...

G
Can you get that in a K-mount?

Comment by hefty1 posted on Which lense?? at 11/06/2008 - 22:42

hefty1
Quote:
It is entirely possible that a lens could have "portrait softness" as due to the rectangular shape of the sensor and film format the extreme edges at the sides are using more extreme edges of the image circle.
I can't see how this can be so? Regardless of whether you take the photo with the camera horizontal or vertical (or any point inbetween) the same part of the lens covers exactly the same part of the sensor and will deliver exactly the same performance. Any variation may be (as Don says) down to the software used to view the results, but not the hardware surely?

Sorry to say, but this is the least convincing argument I've ever heard and another good reason in my book to avoid the BS on DPR...

Comment by hefty1 posted on Which lense?? at 11/06/2008 - 22:19

hefty1
Congratulations Rob - judging by the pictures you've posted from the K100D I'm sure you'll make very good use of the K20D.

I'm also in the "no-grip" camp; like Pete says above, I find the K10D just about right as it is. Having said that, all my lenses are relatively small and lightweight (except the 12-24) so they balance nicely on the camera - if I were a Bigma (for example) user then I'd probably want the extra weight at the camera end to level things up a bit. Still, having the grip doesn't mean you always have to have it attached...

Comment by hefty1 posted on K20D purchase at 07/06/2008 - 11:23

hefty1
Quote:
Heavens. That's a lot, for a non-star lens.
It is, but isn't that around the same price that the DA16-45 launched at? I see this 17-70 as a replacement for that lens in the line up, and I'm sure it won't be too long before prices drop to 16-45 levels...

Comment by hefty1 posted on PENTAX Introduces smc DA 17-70mm f/4 AL [IF] SDM Lens at 04/06/2008 - 10:44

hefty1
Looks like a weevil of some description - nice capture!

Comment by hefty1 posted on Black Beetle at 03/06/2008 - 20:58

hefty1
Quote:
hefty1 wrote:
but the M200 should cost around the £25 mark (depending on condition)
The M200 is fetching a lot more than that at the moment.

One went a couple of weeks ago for £80, and I've just sold one for £60.
That's good news for me then - I got mine recently for £29 and I only paid that much because it was absolutely mint and came with the original hard case and caps.

Not that I was thinking of selling it, but nice to know I got a bargain.

Comment by hefty1 posted on Price and Advice Req'd... at 04/06/2008 - 11:53

hefty1
My M200 is certainly stiffer than my M50 but I see that as a good thing. With a longer focal length you get a narrower depth of field, meaning that your focussing needs to be more accurate - I find that the slightly stiffer action makes very fine adjustments easier to accomplish.

As for price, the M50/1.4 is probably worth around £40-50 on its own so you're effectively getting everything else free - bargain!

Comment by hefty1 posted on Price and Advice Req'd... at 04/06/2008 - 10:39

hefty1
Quote:
I'm not sure if i'll use the 200 as i have the 50-200 DA unless someone advises strongly otherwise??
I won't advise you *strongly*, but the M200 should cost around the £25 mark (depending on condition) and is a whole stop faster than the 50-200 at 200mm (f4 vs f5.6). You lose the convenience of auto focus and you have to use the camera manually, but it's probably worth keeping hold of for those times when you need a telephoto in lower light situations. It's capable of good (if not quite outstanding) results from wide open and if you never end up using it you should at least get your money back on eBay...

I'd buy it if it were me and I didn't already have one.

Comment by hefty1 posted on Price and Advice Req'd... at 03/06/2008 - 21:12

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