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Forum: Pentax K-S1 & K-S2 11-29-2015, 05:52 AM  
Optical preview vibration
Posted By sterretje
Replies: 12
Views: 1,036
Optical preview does not move the mirror. It simply closes the aperture. And at f/1.8 it actually does nothing ;-)

So not sure where your problem comes from.
Forum: Pentax DSLR Discussion 09-27-2015, 09:46 AM  
Equipment to carry for African Safari
Posted By sterretje
Replies: 19
Views: 1,999
I doubt that that is a good idea. Not familiar with Kenya, but locally luggage handlers don't have a good reputation.
Forum: Troubleshooting and Beginner Help 08-06-2015, 04:26 AM  
Here we go again
Posted By sterretje
Replies: 8
Views: 1,074
3rd Way: measure the trigger voltage :)
Forum: Troubleshooting and Beginner Help 07-27-2015, 11:15 PM  
Which lens should I purchase for K-3 and close up portraits with good bokeh and DOF?
Posted By sterretje
Replies: 23
Views: 1,552
You think wrong ;)

A standard zoom (similar to the 18-55) gives you the flexibility to either take a photo of people including the environment (using the wider side like 18mm) or to do a close-up photo of a person's face (using the longer end like 50mm).

Take your camera with kit lens to the shop, dentist or wherever and frame your shots; check the focal length on the kit lens (the numbers from 18 to 55). You can also take photos and examine the focal length afterwards at home. Make some notes like 'I was too close for 55mm'.

That will give you an idea of the focal length that you need. If one focal length really stands out, buy a lens with a focal length close to that; else buy a zoom. If you were often too close, consider a lens with a longer focal length.

A note on DOF and background blur (you might already know). There are three parameters that define the DOF. Longer focal length gives shallower DOF, shorter subject distance gives shallower DOF and a wider aperture gives shallower DOF. How blurred the background is (keeping the DOF the same) depends on the distance from the subject to the background. So taking a photo of somebody in the waiting room at the dentist sitting in a chair against a wall will not result in an extremely blurred background (wall) but if that wall is further away. it will progressively get more blurred.
Forum: Flashes, Lighting, and Studio 07-13-2015, 11:14 PM  
Cactus V6 Radio Trigger Review
Posted By sterretje
Replies: 244
Views: 28,447
Thanks Tanzer,

I see that I've over simplified it :)
Forum: Flashes, Lighting, and Studio 07-12-2015, 11:32 PM  
Cactus V6 Radio Trigger Review
Posted By sterretje
Replies: 244
Views: 28,447
The Wein is probably a simple resistor and zener-diode as in this picture: https://en.wikipedia.org/wiki/File:Zener_diode_voltage_regulator.svg Not much of electronics but yes, there will be a current flowing.
Forum: Troubleshooting and Beginner Help 07-12-2015, 09:23 PM  
K-3 user having trouble
Posted By sterretje
Replies: 8
Views: 968
If in general all your shots are blurry, you might need focus adjustments (something the K10D only allowed via the debug menu); it's somewhere in the menus (see page 45 of the English manual).

If those shots were close-up shots, remember that at close distance your DoF will be shallow, so the slightest forward/backward movement will cause out-of-focus.

PS:
If I'm not mistaken, the K3 review on this site has a section with 'recommended' settings.

PS2:
Found it: https://www.pentaxforums.com/reviews/pentax-k-3-review/recommended-settings.html
Forum: Pentax DSLR Discussion 07-12-2015, 07:01 AM  
K 3II or KS2
Posted By sterretje
Replies: 11
Views: 1,487
K3/II is more in line with the K10D. But for the given use I would happily go for the K-S2; you can even consider a K50. If you have the option, handle them; I think they are quite different.
Forum: Pentax K-30 & K-50 07-11-2015, 11:25 PM  
K30 - silly questions
Posted By sterretje
Replies: 50
Views: 3,773
Get a cheap (probably 2nd hand) mirrorless camera for those; something like the Samsung NX series, Panasonic GH/GF series or Olympus. More money to spend? Sony A7 series (full frame). Add an adaptor and you're good to go :)
Forum: Pentax K-3 07-11-2015, 11:04 PM  
Trigger won't work with K-3 II?
Posted By sterretje
Replies: 11
Views: 1,257
It might be an option to buy your own triggers and take them to the studio; I don't have a K3-II nor radio-triggers, so can't really advice. Ask in the flash section for experiences.

Good luck.
Forum: Pentax K-3 07-11-2015, 06:17 AM  
Trigger won't work with K-3 II?
Posted By sterretje
Replies: 11
Views: 1,257
Sounds like the issue that the K-5 had with (some) Yongnuos. If those are your triggers, you might be able to modify them (requires some trial and error as well as soldering skills).
Forum: Pentax K-3 07-11-2015, 03:49 AM  
Younguo flashes won't fire with K-3
Posted By sterretje
Replies: 7
Views: 988
Just the explanation

1/180s is the fastest shutter speed at which both curtains of the shutter are open at the same time; this is the so-called X-sync. This allows the flash light to cover the full sensor. At e.g. 1/250s, one curtain will not be fully open at the moment that the flash fires. The result will be a picture with a dark band.

Pentax thinks that dSLR users are stupid and need to be protected against themselves :(

If you need a flash at higher shutter speeds, you need to use a HSS capable flash.
Forum: Pentax SLR Lens Discussion 07-11-2015, 01:20 AM  
Equivalent focal length with crop factor
Posted By sterretje
Replies: 286
Views: 12,710
It's the field of view that changes. The 17-50 on a K5 will give roughly the same field of view as the 28-75 on a full frame.



There are two reasons to do so:
  • you don't need the wider end of the 17-50 (nearly always shooting at 28mm or longer or you have another wide-angle option)

  • you're buying it for use on full frame

Forum: Pentax SLR Lens Discussion 07-10-2015, 11:49 PM  
A series and auto diaphragm lens launch
Posted By sterretje
Replies: 19
Views: 1,315
Not wanting to derail the thread but what is the difference between diaphragm and aperture? In Dutch, I always have know the part with the 'blades' as diafragma (diaphragm). When I switched to English, I did not know better than that it was called aperture.

Please enlighten me ;)
Forum: Pentax SLR Lens Discussion 07-10-2015, 04:19 AM  
A series and auto diaphragm lens launch
Posted By sterretje
Replies: 19
Views: 1,315
According to SMC/Super-/Auto-Takumar 55mm F2 Reviews - M42 Screwmount Normal Primes - Pentax Lens Reviews & Lens Database, the auto-tak version existed in 1958.

To my knowledge, that should be a (pre-version of an) auto-aperture lens and that should put you in the ballpark for your second question. Else you can check the info about SuperTaks on this site (around 1962 as far as I can find).
Forum: Flashes, Lighting, and Studio 07-10-2015, 01:45 AM  
Flash : Starblitz 300dfxi - is this safe to use ?
Posted By sterretje
Replies: 7
Views: 902
TTL means through the lens and the camera will determine correct exposure. If this is a dedicated flash for Pentax, it will work on film cameras; it will however not work on a dSLR (unless you have an *istD).

In M mode, it will fire at full power and you need to use the lens aperture to obtain correct exposure.

The only purpose of the ISO slider is to slide the distance scale on the flash so you have an idea of the reach. It would have a functionality if the flash had an auto-thyristor mode.
Forum: Visitors' Center 07-03-2015, 01:32 PM  
WG-III SR Adventure Proof camera won't charge
Posted By sterretje
Replies: 2
Views: 1,312
Not sure which camera you're referring to. I can only find a WG-3 in the manual section on Operation Manuals Download : Support & Service | RICOH IMAGING

Assuming it's the same camera, how do you know it's not charging? Power lamp not flashing? Power lamp does not stop flashing? Other ....?

Note: I'm not familiar with your camera,
Forum: Flashes, Lighting, and Studio 07-01-2015, 10:21 PM  
Off camera P-TTL / wireless advice needed
Posted By sterretje
Replies: 14
Views: 1,281
Read up on the Aokatec :D It fits over the onboard flash and transmits the light signals via radio.
Forum: Flashes, Lighting, and Studio 07-01-2015, 07:07 AM  
Flash : Starblitz 300dfxi - is this safe to use ?
Posted By sterretje
Replies: 7
Views: 902
I could not find information about the trigger voltage; the following youtube video (as an example) shows how you can measure yours:














You Tube



You can always use something like a Wein Safesync or a radiotrigger if it's not safe.

I also can't find a user manual, so it's difficult to say what will work and what not.
Forum: General Talk 06-30-2015, 05:11 AM  
Help needed : extremely SLOW Windows 7 64 bits "Shut Down"
Posted By sterretje
Replies: 50
Views: 3,297
For me an extremely good reason not to upgrade to Win10. I need to be able to decide when I run the update and which updates to apply at that time. If that's not possible, I will probably blow my whole daytime bandwidth budget for the month when I switch the computer on if I can't do that.
Forum: Troubleshooting and Beginner Help 06-30-2015, 04:58 AM  
K10d - after taking photo, all of screen flashes yellow.
Posted By sterretje
Replies: 20
Views: 1,274
Look around in the local adds for a second hand K10D; a working one will simply replace your current one and you keep the old one for spares (just in case).
A non-working one can be used as donor (if the sensor is OK), but don't forget that the repair centre will also charge labour, so it will probably still be relatively expensive.
Forum: Pentax Full Frame 06-28-2015, 09:22 PM  
Now...lets talk about names
Posted By sterretje
Replies: 256
Views: 19,689
I don't want a camera that is refers to some fastfood chain; just as well can call it BigMac in that case :lol:
Forum: Troubleshooting and Beginner Help 06-28-2015, 07:25 AM  
K-r problem with flash not working
Posted By sterretje
Replies: 2
Views: 608
Which lens are you using? Which exposure mode (Av, M, ...)?

Not sure if I can help further, but this information might be relevant.
Forum: Pentax K-S1 & K-S2 06-25-2015, 01:14 AM  
Just bought a K-S1
Posted By sterretje
Replies: 7
Views: 1,061
Can you explain what you mean by that?

If the camera shows up as a drive, that drive should show in PDCU as well. Personally I copy the files first to the computer's hard disk. Next I use PDCU for post processing the copied files (if necessary).
Forum: Pentax K-S1 & K-S2 06-24-2015, 11:57 PM  
KS2 Lens questions. Beginner
Posted By sterretje
Replies: 19
Views: 10,065
You more than likely suffered from slow shutter speeds in the last one; nothing seems to be sharp. Either use tripod or place the camera on the railing of the bridge; switch SR of for those.
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