October 25, 2014, 09:15:44 PM

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.

Messages - Aglet

Pages: 1 ... 22 23 [24] 25 26 ... 70
Lenses / Re: How many megapixels can these lenses resolve?
« on: November 12, 2013, 02:12:23 AM »
The simple answer to your question is as follows:

for any given region of interest, use the table of numbers of LW/PH

take that number, square it, multiply by 1.5 for the 3:2 aspect ratio
divide that by 1,000,000 if you want simple MP and you'll get the equivalent resolution if that portion of the measurement was uniform for the whole frame.

e.g.  center of 17-40 @ f/8 will = ~ 16MP

it's pretty sad when you calculate the corners!

If you measure the top level of the graph, ~3700, you'll get ~21MP which is the MP of the sensor in that body.

Interestingly, under the shell the K-01 is pretty much built from the same components as other pentax DSLRs.  I wouldn't let any fear of repairs in 5 years time stop me buying and enjoying a camera today.
It probably shares a lot with the K-30 which did sell better - and frankly performs about the same functions but also has a mirror and viewfinder - so either one would work as well but the K-01 was available for $150 less when comparing both clearance prices.  I bought a clearance sale K30 also, couldn't resist. It's a very nice consumer grade body with a pentaprism viewfinder and some weather-sealing.

Glad you're enjoying your discovery but it's hard to find any appreciation here for non-Canon, oddball, mirrorless cameras. :)
But you're right, the K-01 is an astoundingly good imaging machine for a really low clearance price.  I like it so much I bought 2 at that deal earlier this year.  Terrific for studio shooting and still-life type work.
I find the display a bit too useless in sunlight, and AF can be indecisive with some lenses.
But you can't beat the image quality from this brick with any Canon cropper!
K-01 has great Hi ISO ability and is also top-teir in low ISO dynamic range and devoid of pattern noise.  IBIS works great too, nearly 4 stops worth here.
I used it the other night to capture some handheld shots, indoors, in very low incandescent light. I was on the floor, watching some TV, when my lady's new red shoes caught my eye.  They made a nice focal point amidst the other colors and textures when she dropped everything right there. Old 18-55mm kit lens.
Light was one frosted 40W tungsten bulb about 15 feet away.  Shot was still underexposed so pushed jpg a bit.

OOC jpeg, EXIF below:

Color Space: sRGB
Contrast: Normal
Custom Rendered: Normal process
Date Time Digitized: 2013:11:09 21:32:57
Date Time Original: 2013:11:09 21:32:57
Exif Version: 2.3
Exposure Bias Value: 0.3
Exposure Mode: Manual exposure
Exposure Program: Aperture priority
Exposure Time: 1 / 5
Flash: Flash did not fire, compulsory flash mode
FlashPix Version: 1.0
FNumber: 5.6
Focal Length: 35
Focal Length In 35mm Film: 52
ISO Speed Ratings: 6400
Metering Mode: Pattern
Pixel X Dimension: 900
Pixel Y Dimension: 596
Saturation: Normal
Scene Capture Type: Standard
Sensing Method: One-chip color area sensor
Sharpness: Normal
Subject Distance Range: Macro
White Balance: Manual white balance

anyone else see the MTF charts here on Tamron's Europe site?  Any thoughts??

that's a pretty big discrepancy in 30 lp/mm curves between sagittal and meridonal at the long end as you go away from center.
Doesn't that make for some annoying aberations and grungy transition bokeh?
Despite that, will wait for some tests to see if it outperforms my old 100-400. If so, then the last "L" in my quiver might hit the market.

Third Party Manufacturers / Re: Off Brand: Nikon Announces the Df
« on: November 07, 2013, 01:57:07 AM »
Just wait until your fore finger needs to reach up and press the shutter button...

color me different then, I prefer a top-deck SR button to the forward angled ones near the front of grips of most cameras today.
However, until I wrap my mitts around a real Df I can't say for sure how well this particular model will fit my hand.  Various photos I've seen makes me think there's a good chance I will like it.

What I'm already sure I won't like is apparently (somewhere I read that) the little PASM mode dial needs to be LIFTED to be turned! If true, that's daft!
The button locks for the other dials should be easy enough to manage with one finger but it's gonna be next to impossible to change mode without taking that camera away from your eye and using both hands with some effort. It should just be a stiffly detented click-stop movement with PASM indicator in the viewfinder.  I don't like how this part works, I regularly switch between A and M.  This would slow me down a bit too much.

Third Party Manufacturers / Re: Appeal of Nikon Df
« on: November 07, 2013, 01:33:59 AM »
Love it, might buy one, Canon can't make one like it.

the comparison shows me something else I've discovered, to my chagrin.
Identical exposure settings produce darker images from Pentax than from CaNikons.
I constantly have to +EV my Pentax when shooting in daylight. Not so much indoors.

Third Party Manufacturers / Re: Off Brand: Nikon Announces the Df
« on: November 05, 2013, 11:29:24 PM »
..people are so bored with what Canon are doing that they're looking elsewhere for excitement


Exactly.  A camera isn't just a tool to capture images.
Some cameras have a personality, a character, and some of them lend themselves better to certain uses by virtue of their design.

CaNikon bodies are, for the most part, rather bland black plastic looking bricks.  I don't find any of them exciting to use.  The D800, for me, comes close but that's mostly because it works very well for what I want it for while most others were somehow disappointing.

This new DF actually looks like a camera design I would ENJOY using, although I'd prefer d800 guts to d4 guts in mine.  I LIKE those manual knobs and buttons.  They're unambiguous, you can adjust them easily by feel, even with gloves on or while the camera is still powered OFF.

The Df looks like an imaging INSTRUMENT, not a black box of wonders with various goodies buried in menus.  The Df is very appealing to the photogs I know because it's causing a more emotional response with them.  We don't NEED a Df, we WANT a Df. (or something just like it in the lens mount of your choice)

EOS Bodies - For Stills / Re: BP511(a) vs. AA in a grip
« on: November 05, 2013, 08:27:53 PM »
Good quality NiMH AA cells should provide as much performance as a good OEM BP511, much more actually.
Try Sanyo Eneloop, possibly Panasonic R2 (?) series AA NiMH with super low self-discharge characteristics.
AA alkalines won't last near as long but a good emergency backup.
I haven't had much luck with other brands of NiMH tho did have some good results from Ray-O-Vac ones some years ago.

The specs are reasonably impressive.
Excellent number of shots from a small battery.
I wish my D800s had this kind of control setup.
And it's LIGHT!  This gets a bit closer to the feel of an old film body just for the reduced weight.
The Df will Dfinitely have to seduce me with the ergonomics and overall feel to make me trade a D800 for it tho, I typically do not need great high ISO performance.
I think this is going to be a polarizing product, love it or hate it.  I think there'll be enough of the former to make it a worthwhile product.
Canon might even copy it. ;)

I will wait for Fuji FF - mirrorless. I wouldn't change anything about Fuji x100s, except body size for 35mm sensor - I'm ok with slightly bigger body size.

That Nikon retro looks  :-\

yup, a big fence for next gear direction.
FF Fuji and FF Pentax rumors yet to bear fruit beyond photo of prototype.
Still luvin my d800s tho might consider swapping one for a Df.  I like all the basic controls on big, glove-able dials.

Gotta love that old film SLR styling straight out of the early 1980's.  To complete the package, you just need a groovy mullet haircut and a sweet ride like an early 80's Mazda 626...
Does that 626 come with some sweet seatcovers?..  you know, the skintight demin variety, big hair, lots of eye makeup and .. ;)

Third Party Manufacturers / Re: Rumor: Nikon Digital FM2 - Retro look
« on: November 04, 2013, 02:23:00 PM »
This isn't just retro looking for retro' sake.
Nikon makes 2-handed cameras. This looks to be an improvement in common control ergonomics over the bodies I've used.  No fiddling with myriads of buttons all over; they're convenient but you need to spend enough time to know where they are and if you're wearing gloves... fuggeddabowdit!
These are nice big dials for ISO, EV comp, shutter, etc.

Canon did something similar but they called it a G11. ;)

If the ergos fit as well as they look, it's a good step.  Looks like plenty of useful still features and no video hooey to clutter up Nik's not-so-intuituve interface or control layout.

it's be a little like going back to my old A-1

Third Party Manufacturers / Re: Rumor: Nikon Digital FM2 - Retro look
« on: November 04, 2013, 09:47:38 AM »

new photos show lots of manual controls on top deck


maybe I'll buy one if it feels good and performs well (low ISO, no FPN, high DR, etc ;) )

edit - link anchor removal

EOS Bodies - For Stills / Re: "Downgrading" for a very specific reason
« on: November 01, 2013, 03:16:40 AM »
I was in a time-wasting mood tonite so looked at over 140 different camera specs on DxOmark and specifically for the metamerism sensitivity ratings.
YUP, 1ds3 and 5d are at 86 and 84 respectively, and these are 2 bodies that are extolled for their image quality.
another good image camera, the 20d, is at 83..  a score it shares with the sx50 compact superzoom and G1x!

Of all the ones I've looked at, there are few bodies on DxoMark that score higher in this metric, 2 are Canons.. and there's a few Sonys. I'm not a Sony fan so not familiar with them but they're included at the bottom.

Would you believe...
coming in at 87 is the....  50D! (my least favorite body because of it's high subjective noise levels)
and, in TOP SPOT, with a SCORING of 88 ...  (Can we have some trumpets please?)
THE 1000D!

Instead of everyone rushing off and wasting a lot more time to see how a bunch of Canon bodies fare (in daylight index), here's what I put together, below.
Generally, it seems that most cameras that score at least in the high 70s can provide pleasing color although we see that even 70 or lower can still provide a decent image, witness the 6D.
Combined with unobtrusive noise characteristics, better CFA results seem to be what's appealing to our visual sense of perceived image quality. (yet there's all those processing factors in there that should be able to make up for a good part of the difference?..)


88   1000d
87   50d
86   1ds3
84   5d
83   sx50
83   g1x
83   20d
82   1d4
81   400d
81   30d
80   550d pre-prod
80   5d2
80   450d
80   s100
79   s90
79   40d
79   350d
78   7d
78   500d
78   1100d
78   G16
77   70d
77   60d
76   g12
76   g11
75   700d
75   s95
75   m
74   5d3
73   650d
73   600d
73   100d
73   1dx
69   6d


85   km
84   mx1
83   k52, k52s
82   k20
82   kx
81   q10
81   K10D
81   k7
78   k500
78   k5
78   k200
77   k50
77   k01
77   kr
76   q
76   k30
75   645D


85   d60
85   d40x
85   d40
84   d300
84   d200
84   d70
84   d70s
84   d50
83   d700
83   d2xs
83   d2x
82   d90
81   1j1, 1v1,
81   p7700
80   d3200
80   d3000
79   1j3, 1v2,
79   coolpix p6000
79   d3s
79   d7100
79   d5200
79   d3x
79   d80
78   1s1, 1j2
78   p7800
78   d800
78   d7000
78   d5100
78   d3100
77   d800e
77   d4
77   d610
77   d600
77   d300s
77   d3
77   coolpix p30
76   coolpix a
75   d2h
73   p7100
71   p7000


86   e520
84   410
83   pen ep2
83   510
82   e600
82   e420
82   e3
80   pen epm2
80   pen epl5
80   pen ep3
80   e5
79   pen ep5
79   omd em5
79   omd em1
79   pen epl3
79   pen epl2
78   pen epm1
78   pen epl1


82   s5pro
81   s3pro
79   xf1
79   f800exr
78   f600exr
77   x100
76   xz1
74   xs1

I'm not a big Sony fan, but most of their stuff is pretty well placed in this area.


87   a900
86   a77, a230,
85   a99, a58, a450, a35,
84   a37
83   a33
82   a100
79   a200, a290
74   a700

Nobody cares what the dynamic range and IQ is of an out of focus picture....

FWIW, OOF image reduces DR.  A useful technique to use if your DR-limited camera can't handle the scene, make an artfully OOF abstract of it. ;)

Pages: 1 ... 22 23 [24] 25 26 ... 70