[Nicolas06]

EVF and live view both take a lot more battery life away than using an OVF -- live view is worse because the screen you are using is bigger, but they both really burn battery life quickly. That's why mirrorless cameras have no where near the number of shots per battery that SLRs do.

Yep, but I guess that also linked to form factor. If you make a mirrorless big, you'd be able to put a decent battery in it. Even without changing its size, I wonder if current Pentax battery couldn't be packed with more energy. Our rated 1860mAh currentl but still significantly big. Some smartphone manage more with smaller form factor. I guess we could pack 3000mAh or something if we wanted... meaning 1000+ shots on DSLR instead of 700+ and on mirrorless maybe 450-500 instead of 300-350 ?

[roseblood11]

New review of the K-70:
Pentax K-70 Review | PhotographyBLOG

[Simen1]

I wonder if current Pentax battery couldn't be packed with more energy. Our rated 1860mAh currentl but still significantly big. Some smartphone manage more with smaller form factor. I guess we could pack 3000mAh or something if we wanted...

Yes, they could probably pack in more energy or choose rectangular shape for more efficient use of the space inside the camera. But remember that D-Li90 have two serial coupled battery cells, each of 1860mAh and 3,6V. Thats why the voltage are 7,2 V and not 3,7-3,8 as is usual for mobile phones single cells. (m)Ah is not a measure of energy capacity, but Wh are. 1860 mAh * 7,2V = 13,4 Wh. In a mobile phone you would typically find 3000 mAh * 3,7V = 11,1 Wh.

The lower (top loaded) voltage for each cell (3,6 vs mobile phones 3,7-3,8) increases the lifespan of the battery (# cycles).

There are some interesting new battery technologies in the pipeline, that may increase energy capacity per weight and volume (Wh/kg and Wh/l), and the power density (W/kg and W/l). The latter may improve the recharge time of the internal flash, enable high speed high resolution video (if the rest of the system are capable) and increase focus motor power (both in camera and in lens focus motors)

Edit: Nikon have a EN-EL18a 3-cell battery for their D4, D4s and D5 camera with 3,6V 2500 mAh cells. This is compatible with their earlier EN-EL18 battery with 3*3,6V 2000 mAh cells. So same volume, but I'm not sure if the weight is affected. Anyway, its a nice way of improving the specs of the camera (CIPA # of shots per charge).

[jgnfld]

New review of the K-70:
Pentax K-70 Review | PhotographyBLOG

Also out there:

ephotozine Pentax K-70 Review
and
shutterbug too Pentax K-70 DSLR Review | Shutterbug (this review asserts the K-70 has no microphone jack input for movies but is otherwise reasonably accurate)

Still haven't seen a really in depth review anywhere.

---

Last edited by jgnfld; 09-02-2016 at 06:18 AM.

[reh321]

The view finder also imply mirror box for DSLR and heavy processing power for the EVF... You may have to pay much more for that device that would support both and it would still be big. The biggest advantage of EVF are smaller size and reduced cost.

IF osv hadn't gone away after being put on timeout, he would have responded by now.telling you that the primary advantage of EVF is a view showing exactly what the recorded image will look like.

---------- Post added 09-02-16 at 12:30 PM ----------

EVF and live view both take a lot more battery life away than using an OVF -- live view is worse because the screen you are using is bigger, but they both really burn battery life quickly. That's why mirrorless cameras have no where near the number of shots per battery that SLRs do.

A K-mount MILC would have more potential room inside because of the required flange distance. I suppose that would leave room for a second battery.

[thibs]

IF osv hadn't gone away after being put on timeout, he would have responded by now.telling you that the primary advantage of EVF is a view showing exactly what the recorded image will look like.

Nope (IMO), more like the final photo on most points (not all) but no way like 'exactly'. IT would be nice but this is, for now, still fantasy.

---------- Post added 09-02-16 at 12:30 PM ----------

A K-mount MILC would have more potential room inside because of the required flange distance. I suppose that would leave room for a second battery.

If the objective is to get its weight more like a DSLR, sure. But then it reduces mirrorless supposedly undisputed advantage: weight/total dimensions.

[Kunzite]

And it makes wide angle lenses as complex to make as for DSLRs.
Pentax had this idea, once - we rejected it. Now we're asking them to try again? Really?

[Nicolas06]

IF osv hadn't gone away after being put on timeout, he would have responded by now.telling you that the primary advantage of EVF is a view showing exactly what the recorded image will look like.

But at the expense of the quality of the actual preview in said viewfinder (blown highlights, latency) and that only apply if you don't post process your pictures. Honestly I don't own an FF but when you see what you get with a nice fat FF OVF, this is increadibly better than a poor EVF with typical 2.7millions dot or if you count 3 colors 0.9MP, so a bit bellow single HD resolution (they count dot, not MP).

I fully agree that having right exposure/dof/bokheh rendering is nice and focus peaking quite cool. But this also come with typical slower AF (even on the Canon 5D mark IV focus is slower in LV than using dedicated PDAF sensor), the removal of the mirror box mean the sensor is much more likely to take some dust and to require cleaning.

I still would want a serious camera with an EVF in Pentax line and with Kmount. IF that make that camera significantly smaller/lighter. I think having both on same camera would require lot of R&D, to pay for the cost of both technologies and would likely be limited to high end device, you'll never buy.

[Nicolas06]

From ephotozine review: Pentax K-70 Review

K70 liveview performance is still not there, by far.

Shutter Response: 0.1s, 0.3s in live view
Wide focus / Shutter response: 0.125s, 0.7s in live view
Full zoom / Shutter response: 0.175s, 0.7s in live view

As the dedicated PDAF with OVF is still much faster, even being the old one from K5-II and not the better one for K3, it seems Pentax really need to work on their firmware.

[rawr]

it seems Pentax really need to work on their firmware

Live view AF is slower than VF AF on any DSLR. Even the D500, I bet.

[Nicolas06]

Live view AF is slower than VF AF on any DSLR. Even the D500, I bet.

From same review website:

Canon 70D is:
Shutter response: 0.05, 0.05 in LV
Wide- focus / shutter response: 0.1, 0.45 in LV
Full zoom - focus /shutter response: 0.15, 0.45 in LV

A6300 (LV only, by definition):
Shutter response: <0.05
Wide- focus / shutter response: 0.125
Full zoom - focus /shutter response: 0.1

OMD10 markII (LV only, by definition):
Shutter response: <0.05
Wide- focus / shutter response: 0.125
Full zoom - focus /shutter response: 0.125


As for D500, this one doesn't claim hybrid PDAF I think on the sensor... 70D and A6300 both claim and are much faster than K70.

This isn't like there anything that prevent LV of DSLR to be fast. OM10 II isn't especially high end, quite comparable to K70 in price and in respective line up, still its live view is fast.

What the point of the fuss ovee that K70 then?

[rawr]

From same review website:

From the same web site's K-70 review:

"Tested with the 18-135mm lens. Live view a little slow compared to competitors such as the Canon EOS 750D, although focus is quicker than the Nikon D5500."

Not as gloomy as your own conclusions. And many of the results are also lens dependent.

[Nicolas06]

From the same web site's K-70 review:

"Tested with the 18-135mm lens. Live view a little slow compared to competitors such as the Canon EOS 750D, although focus is quicker than the Nikon D5500."

Not as gloomy as your own conclusions. And many of the results are also lens dependent.

It is gloomy because D5500 hasn't a sensor made for that and do not advertise that AF in live view. D5500 has other things to make it sell (like much better AF in OVF mode, a touch screen, in lens SR in video...).

Even if this is lens dependant, if only the 55-300 RE is capable that's a big issues because by the time a real line-up is here, 5 years will have passed and nobody will care of K70 anymore...

In practice for still use a K3 is much better choice for AF, not really worse in video, will last much more and the same price.

[shiner]

It looks like almost nobody in this thread has ventured to actually acquire one and check it out in the real world.

[jgnfld]

It is gloomy because D5500 hasn't a sensor made for that and do not advertise that AF in live view. D5500 has other things to make it sell (like much better AF in OVF mode, a touch screen, in lens SR in video...).

Even if this is lens dependant, if only the 55-300 RE is capable that's a big issues because by the time a real line-up is here, 5 years will have passed and nobody will care of K70 anymore...

In practice for still use a K3 is much better choice for AF, not really worse in video, will last much more and the same price.

Your conclusion may be country dependent. For example, the K3 is unavailable in Canada at any outlet I've seen. The K3ii is NOT the same price as the K70...basically $1150Cdn versus $750Cdn.

---------- Post added 09-03-16 at 08:55 AM ----------

It looks like almost nobody in this thread has ventured to actually acquire one and check it out in the real world.

I have, as have others. See various K70 threads in the SLR forums.

Here's one K70 pic requiring fast and accurate focus taken with the old 55-300 SMC DAL as my PLM has not yet arrived.





Note that you can see me shooting into this pretty dense thicket from a pondside trail in the warbler's eye. I personally consider this good sharpness as the eye is about 4mm and the pic is taken at a range that this was required to be a near 100% crop even at 300mm. (click pic for exif info)