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Forum: Pentax DSLR Discussion 03-12-2017, 06:53 PM  
understanding the 1.5 crop factor
Posted By jabobby
Replies: 37
Views: 4,674
TonyW & MarkJerling, I absolutely love the beautiful information supplied on this forum. Back in the 60's, 70's & 80's a person would have to purchase several different magazines and hope to acquire the information provided here. Also it would have been the same with regards to seeing the vast number of fantastic photos that so many people post here on this forum. This forum has been as inspiration to me and I sure am excited about getting back to the pleasure of capturing the images. To all of you I say thank you again, Bob

---------- Post added 03-12-17 at 07:14 PM ----------

normhead, after reading many of the other threads regarding these issues discussed here I was expecting input from you. Very well stated and I thank you. BTW, thanks for the awesome shot of the bird. Also my nephew is planning on purchasing a Lumix 4/3 for his extended walkabouts and his reasoning is just about the same as what you stated.
Thanks again, Bob
Forum: Pentax DSLR Discussion 03-12-2017, 06:40 PM  
understanding the 1.5 crop factor
Posted By jabobby
Replies: 37
Views: 4,674
Keith23, Now that I have a much better understanding of the crop frame concept it will greatly assist me in choosing appropriate lenses for which ever camera I decide to purchase. In fact, the lens choice will be the determining factor for which camera I get.

Kerrowdown, I agree, that almost makes the K-1 an easier choice for an old film school fella like me.

pschute, What you have stated concerning the enlargement (crop) of the image is something I have certainly noticed with many photos on this forum.

pjv, I like your little drawing, I just made one much like yours to illustrate for my nephew. But mine lacks the copyright!
Forum: Pentax DSLR Discussion 03-12-2017, 03:04 PM  
understanding the 1.5 crop factor
Posted By jabobby
Replies: 37
Views: 4,674
tibbitts, thank you for the reply, slowly I am learning the wonders of this transition from film to digital.

TonyW, That is some great info, thank you.

Mark Jerling, I read all that and I am gaining a much better grasp of all this, thanks.

TomMass, I am certainly one of those old codgers and it sure is a wild ride to the new world of digital photography.

Never owned or used a APS-C camera and right now I am undecided of which format to go with. I definitely see the advantages of either. Have been considering the K3-2 or the K-1. I am sure that I would enjoy either. Most of my shots are of wildlife & landscape & with the K3 the cost sure would be far less and I could use all my old Pentax glass with either one of them. This forum is so full of fantastic advice & examples from some very talented people and that is a great help for me to learn & make decisions on equipment.

A very big thanks to all, Bob

---------- Post added 03-12-17 at 03:06 PM ----------

Parallax, that is good advice & I am going to follow it, thank you
Forum: Pentax DSLR Discussion 03-12-2017, 12:21 PM  
understanding the 1.5 crop factor
Posted By jabobby
Replies: 37
Views: 4,674
OK, I just found the information needed for perfect explanations in older threads which were shown after I posted that question. It is only a difference with the image seen by the sensor. Thank you to all who provided the threads in the past.
Best Regards, Bob
Forum: Pentax DSLR Discussion 03-12-2017, 12:00 PM  
understanding the 1.5 crop factor
Posted By jabobby
Replies: 37
Views: 4,674
I need help to understand a few items. My understanding is that some of the lens designed for the crop frame cameras project a smaller image circle to be compatible with the smaller sensor. If a full frame lens is mounted to a crop frame camera I assume that the image captured on the sensor is roughly 2/3 the size of full frame, thereby being the 1.5 crop factor. It seems to me then that in a sense there is a zoom effect which creates the extended focal length effect such as the 24mm-70mm being approximately equivalent to 36mm-105mm. If my assumption is correct then the 1.5 crop factor would apply to any full frame lens mounted to the APS-C cameras. Can you please tell me if I am misunderstanding all this.
Best Regards, Bob
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