MrB

Joined: 29th May 2011

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MrB
Algi, parallax errors occur when the position of the viewfinder objective lens is offset from the position of the camera lens, so that the viewfinder eyepiece lens receives a different image from that recorded by the camera. In a DSLR, the image is received only by the camera lens, and that one image is either reflected up to the eyepiece of the viewfinder, or that same image is transferred electronically from the sensor to the live view screen. When the shutter button is pressed, that same image is then recorded by the camera.

Cheers.
Philip

Comment by MrB posted on TCSTV Review of the KP at 14/03/2017 - 11:49

MrB
Algernon wrote:

SLR's became popular, because they didn't suffer from parallax problems and now we have a reviewer downgrading a camera for having an on axis flip screen saying it should go about six inches to the side where it will introduce massive parallax errors

If you really insist on taking photos buy a smartphone which does away with the parallax errors. If you like (like I do) to take photos of people with trees or street lights growing out of their heads...... don't use a parallax inducing DSLR.... use a smartphone.
--
Is this about flip screens or is it just about being flippant?

A live view screen shows what the sensor sees - no parallax issues. The main reason I prefer the fully-articulated screen of the K-70, is that it shows the image that can be recorded when using the camera at awkward angles, whether in landscape or portrait orientation, and in particular from low camera positions - when I don't want to get down on hands and knees to look through the viewfinder.

Cheers.
Philip

Comment by MrB posted on TCSTV Review of the KP at 14/03/2017 - 10:08

MrB
As many of the examples so far mention backgrounds, I've just done these two examples to concentrate on the subject. Both were taken with the DA 20-40, using the on-board flash, and in both the camera was level with the headlamps of the model car. The second (at F=40mm) was taken from twice the distance compared with the first. Each image has been cropped to consider only the differences in the perspective of the subject itself:

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Cheers.
Philip

Comment by MrB posted on You poo-pood my comment at 14/03/2017 - 07:56

MrB
If there is a price increase as much as 20% on existing products, which seems unlikely to me as it would be another nail in the coffin, the K-70 would still be £400 less than the KP. The differences in the KP. some of which are improvements, are not significant enough for me to pay so much extra but, as always, to each his own. Nevertheless, I would be surprised if anyone who gets a KP (for mainly stills photography) would be disappointed with it - it looks a fine camera.

Cheers.
Philip

Comment by MrB posted on TCSTV Review of the KP at 13/03/2017 - 07:36

MrB
michaelblue wrote:
£599.99 body only.......£601.99 with the 50mm f1.8 lens
SRS: http://www.srsmicrosystems.co.uk/cameras/interchangable-lens-cameras/pentax-dslr...

Comment by MrB posted on Amazon K-70 Body only lightning deal at 11/03/2017 - 04:09

MrB
jules wrote:
https://www.youtube.com/watch?v=RjSNou9cQq0

Not exactly a glowing report...
There are lots of positives there and, as for the negatives, I either agree or they wouldn't bother me. However, as I have written similarly elsewhere, it is not surprising that his conclusion re. comparison with the K-70 is the most significant in my view - I wouldn't want to spend twice as much on the KP. If I were looking to buy, for a similar outlay I would prefer to spend on two K-70s or a K-70 plus another good sub-£500 lens.

Cheers.
Philip

Comment by MrB posted on TCSTV Review of the KP at 10/03/2017 - 09:15

MrB
Pertinent to your posted example, you can also stitch vertically, so you could have included more of the street plus the top of the building. The following image was two shots - overlapping top and bottom halves - stitched in Microsoft ICE to give a high res square image (about 25 megapixels); ICE automatically straightened the verticals, but the user also has control of that:

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Cheers.
Philip

Comment by MrB posted on Wide Angle lens for Building & Architecture Photography. at 09/03/2017 - 17:43

MrB
For wide shots, you might like to try a different approach. Use any of your lenses at its sweet spot for sharpness, take several overlapping shots, and stitch them together in software. This photo of Kingston Lacy House started as four images shot hand-held from left to right with a 35mm lens on a K-5IIs; they were then stitched in the free software from Microsoft, called Image Composite Editor (Microsoft ICE). This gave a very high resolution composite image (around 40 megapixels), downsized for display here:

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Cheers.
Philip

Comment by MrB posted on Wide Angle lens for Building & Architecture Photography. at 08/03/2017 - 18:32

MrB
I would have expected that Live View should work:
In Camera Menu 1 set AF Mode = AF.S.
In Camera Menu 3 select Live View and set Autofocus Method to the black and white circle (contrast detect).
In Spanner Menu 1 make sure that Beep is set to audible.
In C Menu 2 see that AF.S setting is 1.
Press the LV button for Live View.
Compose on the rear screen and half-press the shutter button - camera should focus the lens and beep its focus confirmation.
Complete the shutter press.
Does this work?

Cheers.
Philip

Comment by MrB posted on Kr autofocus problem at 04/03/2017 - 14:22

MrB
Mag07 wrote:
It's quite interesting to see how people find it overpriced because it's 'mid' market; instead of looking at the price to feature ratio. What's out there, 'mid' market, at this price point, with such a comprehensive, 'non gimped' feature list? Genuine question as I am only familiar with few other models and non seem as attractive at 1k as this for general purposes.
Regarding the price, the significant point might be neither whether it is mid-range, nor what else is out there at a similar price point, but rather the price-to-feature ratio when compared along the Pentax scale of things.

Looking at the differences between the K-70 and the KP, although several features of the KP can be regarded as improvements, they are not significant enough for me to want to spend double the price of the K-70.

But, of course, to each his own.

Cheers.
Philip

Comment by MrB posted on K3 v KP at 03/03/2017 - 09:06

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