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Forum: Pentax K-3 08-16-2019, 04:15 AM  
Re: K3ii Battery Grip AA Battery
Posted By RuiC
Replies: 7
Views: 892
Didn't know about AA lithium 1.5 V batteries. Sorry. For me it's Alkaline 1.5V. Lithium... no thanks. RuiC


http://data.energizer.com/pdfs/lithiuml91l92_appman.pdf

quote:
"Although the higher OCV of the LiFeS2 system is 1.8 volts, the nominal or rated voltage is 1.5 volts which makes it a suitable replacement for alkaline and nickel systems. The battery voltage will drop when it is placed under load. For this reason, the higher OCV will typically not damage electronic components, but device designers should take into consideration that the OCV of fresh batteries can range from 1.79 to 1.83V."
Forum: Pentax K-3 08-15-2019, 02:33 PM  
Re: K3ii Battery Grip AA Battery
Posted By RuiC
Replies: 7
Views: 892
Wrong battery you got there! AA batteries to be used are the 1.5V alkaline type. Lithium batteries are 3V and come in another package.
Forum: Pentax DSLR Discussion 11-17-2018, 04:48 PM  
White deposits on the K-3 body
Posted By RuiC
Replies: 9
Views: 866
I usually use a small drop of sweet almond oil on a soft tooth brush. It brings back that "like new" look.
Forum: Pentax SLR Lens Discussion 08-31-2018, 04:11 PM  
Astrophotography + SMC Pentax-FA* 24mm F2 AL [IF]
Posted By RuiC
Replies: 17
Views: 2,400
I am still learning how to start astro photography.
Forum: General Photography 08-31-2018, 04:08 PM  
48MP cell phone sensor, does this mean a new round of DSLRs are dying articles
Posted By RuiC
Replies: 31
Views: 1,457
They are handy sometimes but larger formats are more convincing!
Forum: Digital Processing, Software, and Printing 08-31-2018, 04:04 PM  
Best Cloud storage
Posted By RuiC
Replies: 14
Views: 592
I am a bit lazy and have tried several sources but have let them go untouched!
Forum: Pentax DSLR Discussion 08-31-2018, 03:59 PM  
Thank you!
Posted By RuiC
Replies: 57
Views: 3,284
Thanks for all and best wishes for your future! Let us know.
Forum: Pentax Forums Giveaways 08-29-2018, 03:11 AM  
Pentax Giveaway "What will you do if you win?"
Posted By RuiC
Replies: 180
Views: 4,531
First thing I would do would be to say thank you! Then we would find what to do!
Forum: Pentax DSLR Discussion 07-28-2018, 03:23 PM  
Infrared capacity of your camera
Posted By RuiC
Replies: 20
Views: 2,015
Thanks Fred.
Forum: Pentax DSLR Discussion 07-28-2018, 03:36 AM  
Infrared capacity of your camera
Posted By RuiC
Replies: 20
Views: 2,015
Somewhat offtopic, I apologize, but any suggestions on where to modify a istD for IR , in Europe ? Or any thread dealing with the matter.

Thanks,
Rui
Forum: Troubleshooting and Beginner Help 01-29-2018, 01:39 PM  
Lens will not screw on to Body - Pentax MX and Tou/Five star 80-200mm Lens by Toyo.
Posted By RuiC
Replies: 11
Views: 903
Yes, it is a K mount lens! That aperture lever should never have been bent, unless there is a particular reason for it! You just straighten it up and there you go!
Forum: Pentax DSLR Discussion 10-05-2017, 12:28 PM  
DPReview High ISO Noise D850 vs K-1
Posted By RuiC
Replies: 29
Views: 3,586
You can check the K1 exif data
Forum: Pentax Film SLR Discussion 05-30-2017, 11:51 AM  
LX viewfinder
Posted By RuiC
Replies: 7
Views: 1,051
Forum: Pentax Film SLR Discussion 05-28-2017, 11:21 AM  
Help finding the source of this light leak
Posted By RuiC
Replies: 15
Views: 3,232
Take the lens out, fire the shutter in B mode without film and back cover closed. With a light behind, look through the mirror box to trace the leak!
Forum: General Photography 04-16-2017, 01:51 PM  
Italian photojournlaist with Pentax camera on CBS newscast
Posted By RuiC
Replies: 7
Views: 1,516















You Tube



Forum: Pentax K-1 03-29-2017, 06:18 AM  
Can I use older 645 A manual lens on a K1?
Posted By RuiC
Replies: 18
Views: 1,212
Mount a 645 120mm + adapter on a K body and then mount a SMC K 120mm on the same K body and compare!! Thatīs all you need!
Forum: Pentax K-1 03-29-2017, 04:11 AM  
Can I use older 645 A manual lens on a K1?
Posted By RuiC
Replies: 18
Views: 1,212
NO, NO. A 80-160 645 lens with the 645xK adapter will still have the same FOV in 35mm as is in 645. Try to find the 645 x K adapter manual and read carefully!! I have several 645 lenses and they have the very same FOV in the 35mm format as the K lenses counterpart.

That would be true IF you mount a 645 directly on a K body. As that is impossible and an adapter is needed for that what makes the 645 lens to behave the same as the K lens in terms of FOV.
Forum: General Photography 12-30-2016, 06:00 AM  
Portugal in February
Posted By RuiC
Replies: 14
Views: 1,084
Yes, Sintra, Quinta da Regaleira is a must but booked with a guide! Lisbon is very nice for street photography around Alfama and Mouraria, Bairro Alto. Just walk around with your eyes open! :) For Sintra take the train, don't go by car!

If you go north to Porto (2,5 hours by fast train from Lisbon) you'll find it addicting, just walk downtown near the river and don't forget to visit Livraria LELLO one of the most beautiful architecture you can find.
Evora is SE of Lisbon, and Guimaraes NE of Porto are also worth a visit.

Enjoy portuguese cuisine!!
Forum: Pentax Medium Format 12-24-2016, 09:51 AM  
Decision-making
Posted By RuiC
Replies: 29
Views: 2,787
At this time none is which !!! :p
Forum: Troubleshooting and Beginner Help 12-11-2016, 11:11 AM  
Pentax K 3 ii, weird VIdeo Background Audio
Posted By RuiC
Replies: 7
Views: 1,084
That's not noise but ambient sound! Follow Steve's advice!
Forum: Pentax DSLR Discussion 11-26-2016, 03:02 PM  
Is the k-3 II worth it?
Posted By RuiC
Replies: 30
Views: 2,825
Again I was reviewing the K-3 II review and what I supposed to be a solution is not feasible unless you use a 360 or 540 flash. :(
Forum: Pentax DSLR Discussion 11-26-2016, 07:08 AM  
Is the k-3 II worth it?
Posted By RuiC
Replies: 30
Views: 2,825
Who cares to use off-camera flash unit(s) won't bother to put a pocket size small flash unit to trigger it anyway! ;)
Forum: Pentax Forums Giveaways 09-07-2016, 10:06 AM  
PF 10th Anniversary - Pentax K-50 1-Day Giveaway! - Entries closed, winner announced.
Posted By RuiC
Replies: 1,825
Views: 67,456
Nice to bring over the bull fighting sessions in Spain !!!
Forum: Pentax K-1 03-14-2016, 02:31 PM  
K-1 extended warranty?
Posted By RuiC
Replies: 10
Views: 1,221
On next summer trip go to Italy and by from FOWA , the italian importer. They offer 4 year warranty !!
Forum: Pentax K-5 03-11-2016, 01:24 PM  
Red self timer light flashing
Posted By RuiC
Replies: 4
Views: 1,213
Was that the first time you have used the flash on that camera? Which brand and model is it ?
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